diff --git a/packages/core/src/entity/BaseEntity.ts b/packages/core/src/entity/BaseEntity.ts
index b5e7e90db2bb..b0447a9f45dc 100644
--- a/packages/core/src/entity/BaseEntity.ts
+++ b/packages/core/src/entity/BaseEntity.ts
@@ -1,5 +1,5 @@
 import { Reference } from './Reference';
-import type { AutoPath, Ref, EntityData, EntityDTO, Loaded, AddEager, LoadedReference } from '../typings';
+import type { AutoPath, Ref, EntityData, EntityDTO, Loaded, AddEager, LoadedReference, EntityKey } from '../typings';
 import type { AssignOptions } from './EntityAssigner';
 import { EntityAssigner } from './EntityAssigner';
 import type { EntityLoaderOptions } from './EntityLoader';
@@ -30,7 +30,9 @@ export abstract class BaseEntity {
     return Reference.create(this) as unknown as Ref<Entity> & LoadedReference<Loaded<Entity, AddEager<Entity>>>;
   }
 
-  toObject<Entity extends this = this>(ignoreFields: string[] = []): EntityDTO<Entity> {
+  toObject<Entity extends this = this, Ignored extends EntityKey<Entity> = never>(ignoreFields: Ignored[]): Omit<EntityDTO<Entity>, Ignored>;
+  toObject<Entity extends this = this>(...args: unknown[]): EntityDTO<Entity>;
+  toObject<Entity extends this = this, Ignored extends EntityKey<Entity> = never>(ignoreFields?: Ignored[]): Omit<EntityDTO<Entity>, Ignored> {
     return helper(this as unknown as Entity).toObject(ignoreFields);
   }
 
diff --git a/packages/core/src/entity/WrappedEntity.ts b/packages/core/src/entity/WrappedEntity.ts
index 78488027955f..f105ab8a7f18 100644
--- a/packages/core/src/entity/WrappedEntity.ts
+++ b/packages/core/src/entity/WrappedEntity.ts
@@ -1,8 +1,8 @@
 import { inspect } from 'util';
 import type { EntityManager } from '../EntityManager';
 import type {
-  AnyEntity, ConnectionType, Dictionary, EntityData, EntityDictionary, EntityMetadata, IHydrator, EntityValue,
-  IWrappedEntityInternal, Populate, PopulateOptions, Primary, AutoPath, Loaded, Ref, AddEager, Loaded, LoadedReference,
+  AnyEntity, ConnectionType, Dictionary, EntityData, EntityDictionary, EntityMetadata, IHydrator, EntityValue, EntityKey,
+  IWrappedEntityInternal, Populate, PopulateOptions, Primary, AutoPath, Loaded, Ref, AddEager, Loaded, LoadedReference, EntityDTO,
 } from '../typings';
 import { Reference } from './Reference';
 import { EntityTransformer } from '../serialization/EntityTransformer';
@@ -16,7 +16,7 @@ import type { EntityIdentifier } from './EntityIdentifier';
 import { helper } from './wrap';
 import type { SerializationContext } from '../serialization/SerializationContext';
 
-export class WrappedEntity<T extends object> {
+export class WrappedEntity<Entity extends object> {
 
   __initialized = true;
   __touched = false;
@@ -26,29 +26,29 @@ export class WrappedEntity<T extends object> {
   __onLoadFired?: boolean;
   __schema?: string;
   __em?: EntityManager;
-  __serializationContext: { root?: SerializationContext<T>; populate?: PopulateOptions<T>[] } = {};
+  __serializationContext: { root?: SerializationContext<Entity>; populate?: PopulateOptions<Entity>[] } = {};
   __loadedProperties = new Set<string>();
   __loadedRelations = new Set<string>();
   __data: Dictionary = {};
   __processing = false;
 
   /** stores last known primary key, as its current state might be broken due to propagation/orphan removal, but we need to know the PK to be able t remove the entity */
-  __pk?: Primary<T>;
+  __pk?: Primary<Entity>;
 
   /** holds the reference wrapper instance (if created), so we can maintain the identity on reference wrappers too */
-  __reference?: Reference<T>;
+  __reference?: Reference<Entity>;
 
   /** holds last entity data snapshot, so we can compute changes when persisting managed entities */
-  __originalEntityData?: EntityData<T>;
+  __originalEntityData?: EntityData<Entity>;
 
   /** holds wrapped primary key, so we can compute change set without eager commit */
   __identifier?: EntityIdentifier;
 
-  constructor(private readonly entity: T,
+  constructor(private readonly entity: Entity,
               private readonly hydrator: IHydrator,
-              private readonly pkGetter?: (e: T) => Primary<T>,
-              private readonly pkSerializer?: (e: T) => string,
-              private readonly pkGetterConverted?: (e: T) => Primary<T>) { }
+              private readonly pkGetter?: (e: Entity) => Primary<Entity>,
+              private readonly pkSerializer?: (e: Entity) => string,
+              private readonly pkGetterConverted?: (e: Entity) => Primary<Entity>) { }
 
   isInitialized(): boolean {
     return this.__initialized;
@@ -63,25 +63,25 @@ export class WrappedEntity<T extends object> {
     this.__lazyInitialized = false;
   }
 
-  toReference(): Ref<T> & LoadedReference<Loaded<T, AddEager<T>>> {
+  toReference(): Ref<Entity> & LoadedReference<Loaded<Entity, AddEager<Entity>>> {
     this.__reference ??= new Reference(this.entity);
-    return this.__reference as Ref<T> & LoadedReference<Loaded<T, AddEager<T>>>;
+    return this.__reference as Ref<Entity> & LoadedReference<Loaded<Entity, AddEager<Entity>>>;
   }
 
-  toObject(ignoreFields: string[] = []): EntityData<T> {
-    return EntityTransformer.toObject(this.entity, ignoreFields) as EntityData<T>;
+  toObject<Ignored extends EntityKey<Entity> = never>(ignoreFields?: Ignored[]): Omit<EntityDTO<Entity>, Ignored> {
+    return EntityTransformer.toObject(this.entity, ignoreFields);
   }
 
-  toPOJO(): EntityData<T> {
+  toPOJO(): EntityDTO<Entity> {
     return EntityTransformer.toObject(this.entity, [], true);
   }
 
-  toJSON(...args: any[]): EntityDictionary<T> {
+  toJSON(...args: any[]): EntityDictionary<Entity> {
     // toJSON methods is added to the prototype during discovery to support automatic serialization via JSON.stringify()
     return (this.entity as Dictionary).toJSON(...args);
   }
 
-  assign(data: EntityData<T>, options?: AssignOptions): T {
+  assign(data: EntityData<Entity>, options?: AssignOptions): Entity {
     if ('assign' in this.entity) {
       return (this.entity as Dictionary).assign(data, options);
     }
@@ -89,7 +89,7 @@ export class WrappedEntity<T extends object> {
     return EntityAssigner.assign(this.entity, data, options);
   }
 
-  async init<P extends Populate<T> = Populate<T>>(populated = true, populate?: P, lockMode?: LockMode, connectionType?: ConnectionType): Promise<T> {
+  async init<P extends Populate<Entity> = Populate<Entity>>(populated = true, populate?: P, lockMode?: LockMode, connectionType?: ConnectionType): Promise<Entity> {
     if (!this.__em) {
       throw ValidationError.entityNotManaged(this.entity);
     }
@@ -119,7 +119,7 @@ export class WrappedEntity<T extends object> {
     return pk != null;
   }
 
-  getPrimaryKey(convertCustomTypes = false): Primary<T> | null {
+  getPrimaryKey(convertCustomTypes = false): Primary<Entity> | null {
     const prop = this.__meta.getPrimaryProps()[0];
 
     if (this.__pk != null && this.__meta.compositePK) {
@@ -138,7 +138,7 @@ export class WrappedEntity<T extends object> {
   }
 
   // this method is currently used only in `Driver.syncCollection` and can be probably removed
-  getPrimaryKeys(convertCustomTypes = false): Primary<T>[] | null {
+  getPrimaryKeys(convertCustomTypes = false): Primary<Entity>[] | null {
     const pk = this.getPrimaryKey(convertCustomTypes);
 
     if (pk == null) {
@@ -147,17 +147,17 @@ export class WrappedEntity<T extends object> {
 
     if (this.__meta.compositePK) {
       return this.__meta.primaryKeys.reduce((ret, pk) => {
-        const child = this.entity[pk] as AnyEntity<T> | Primary<unknown>;
+        const child = this.entity[pk] as AnyEntity<Entity> | Primary<unknown>;
 
         if (Utils.isEntity(child, true)) {
           const childPk = helper(child).getPrimaryKeys(convertCustomTypes);
-          ret.push(...childPk as Primary<T>[]);
+          ret.push(...childPk as Primary<Entity>[]);
         } else {
-          ret.push(child as Primary<T>);
+          ret.push(child as Primary<Entity>);
         }
 
         return ret;
-      }, [] as Primary<T>[]);
+      }, [] as Primary<Entity>[]);
     }
 
     return [pk];
@@ -171,8 +171,8 @@ export class WrappedEntity<T extends object> {
     this.__schema = schema;
   }
 
-  setPrimaryKey(id: Primary<T> | null) {
-    this.entity[this.__meta!.primaryKeys[0]] = id as EntityValue<T>;
+  setPrimaryKey(id: Primary<Entity> | null) {
+    this.entity[this.__meta!.primaryKeys[0]] = id as EntityValue<Entity>;
     this.__pk = id!;
   }
 
@@ -180,16 +180,16 @@ export class WrappedEntity<T extends object> {
     return this.pkSerializer!(this.entity);
   }
 
-  get __meta(): EntityMetadata<T> {
-    return (this.entity as IWrappedEntityInternal<T>).__meta!;
+  get __meta(): EntityMetadata<Entity> {
+    return (this.entity as IWrappedEntityInternal<Entity>).__meta!;
   }
 
   get __platform() {
-    return (this.entity as IWrappedEntityInternal<T>).__platform!;
+    return (this.entity as IWrappedEntityInternal<Entity>).__platform!;
   }
 
-  get __primaryKeys(): Primary<T>[] {
-    return Utils.getPrimaryKeyValues(this.entity, this.__meta!.primaryKeys) as Primary<T>[];
+  get __primaryKeys(): Primary<Entity>[] {
+    return Utils.getPrimaryKeyValues(this.entity, this.__meta!.primaryKeys) as Primary<Entity>[];
   }
 
   [inspect.custom]() {
diff --git a/packages/core/src/serialization/EntityTransformer.ts b/packages/core/src/serialization/EntityTransformer.ts
index 3d2d6db0f1ea..e7b08d8ae839 100644
--- a/packages/core/src/serialization/EntityTransformer.ts
+++ b/packages/core/src/serialization/EntityTransformer.ts
@@ -1,5 +1,5 @@
 import type { Collection } from '../entity/Collection';
-import type { AnyEntity, EntityData, EntityKey, EntityMetadata, EntityValue, IPrimaryKey } from '../typings';
+import type { AnyEntity, EntityDTO, EntityKey, EntityMetadata, EntityValue, IPrimaryKey } from '../typings';
 import { helper, wrap } from '../entity/wrap';
 import type { Platform } from '../platforms';
 import { Utils } from '../utils/Utils';
@@ -7,7 +7,7 @@ import { ReferenceKind } from '../enums';
 import type { Reference } from '../entity/Reference';
 import { SerializationContext } from './SerializationContext';
 
-function isVisible<T extends object>(meta: EntityMetadata<T>, propName: EntityKey<T>, ignoreFields: string[] = []): boolean {
+function isVisible<Entity extends object>(meta: EntityMetadata<Entity>, propName: EntityKey<Entity>, ignoreFields: string[] = []): boolean {
   const prop = meta.properties[propName];
   const visible = prop && !prop.hidden;
   const prefixed = prop && !prop.primary && propName.startsWith('_'); // ignore prefixed properties, if it's not a PK
@@ -17,7 +17,7 @@ function isVisible<T extends object>(meta: EntityMetadata<T>, propName: EntityKe
 
 export class EntityTransformer {
 
-  static toObject<T extends object>(entity: T, ignoreFields: string[] = [], raw = false): EntityData<T> {
+  static toObject<Entity extends object, Ignored extends EntityKey<Entity> = never>(entity: Entity, ignoreFields: Ignored[] = [], raw = false): Omit<EntityDTO<Entity>, Ignored> {
     if (!Array.isArray(ignoreFields)) {
       ignoreFields = [];
     }
@@ -26,15 +26,15 @@ export class EntityTransformer {
     let contextCreated = false;
 
     if (!wrapped.__serializationContext.root) {
-      const root = new SerializationContext<T>(wrapped.__serializationContext.populate ?? []);
+      const root = new SerializationContext<Entity>(wrapped.__serializationContext.populate ?? []);
       SerializationContext.propagate(root, entity, isVisible);
       contextCreated = true;
     }
 
     const root = wrapped.__serializationContext.root!;
     const meta = wrapped.__meta;
-    const ret = {} as EntityData<T>;
-    const keys = new Set<EntityKey<T>>();
+    const ret = {} as EntityDTO<Entity>;
+    const keys = new Set<EntityKey<Entity>>();
 
     if (meta.serializedPrimaryKey && !meta.compositePK) {
       keys.add(meta.serializedPrimaryKey);
@@ -53,7 +53,7 @@ export class EntityTransformer {
     }
 
     [...keys]
-      .filter(prop => raw ? meta.properties[prop] : isVisible<T>(meta, prop, ignoreFields))
+      .filter(prop => raw ? meta.properties[prop] : isVisible<Entity>(meta, prop, ignoreFields))
       .map(prop => {
         const cycle = root.visit(meta.className, prop);
 
@@ -61,7 +61,7 @@ export class EntityTransformer {
           return [prop, undefined];
         }
 
-        const val = EntityTransformer.processProperty<T>(prop, entity, raw);
+        const val = EntityTransformer.processProperty<Entity>(prop, entity, raw);
 
         if (!cycle) {
           root.leave(meta.className, prop);
@@ -70,7 +70,7 @@ export class EntityTransformer {
         return [prop, val] as const;
       })
       .filter(([, value]) => typeof value !== 'undefined')
-      .forEach(([prop, value]) => ret[this.propertyName(meta, prop!, wrapped.__platform)] = value as EntityValue<T>);
+      .forEach(([prop, value]) => ret[this.propertyName(meta, prop!, wrapped.__platform)] = value as any);
 
     if (!visited) {
       root.visited.delete(entity);
@@ -83,12 +83,12 @@ export class EntityTransformer {
     // decorated getters
     meta.props
       .filter(prop => prop.getter && !prop.hidden && typeof entity[prop.name] !== 'undefined')
-      .forEach(prop => ret[this.propertyName(meta, prop.name, wrapped.__platform)] = entity[prop.name]);
+      .forEach(prop => ret[this.propertyName(meta, prop.name, wrapped.__platform)] = entity[prop.name] as any);
 
     // decorated get methods
     meta.props
       .filter(prop => prop.getterName && !prop.hidden && entity[prop.getterName] as unknown instanceof Function)
-      .forEach(prop => ret[this.propertyName(meta, prop.name, wrapped.__platform)] = (entity[prop.getterName!] as () => EntityValue<T>)());
+      .forEach(prop => ret[this.propertyName(meta, prop.name, wrapped.__platform)] = (entity[prop.getterName!] as () => any)());
 
     if (contextCreated) {
       root.close();
@@ -97,19 +97,19 @@ export class EntityTransformer {
     return ret;
   }
 
-  private static propertyName<T>(meta: EntityMetadata<T>, prop: EntityKey<T>, platform?: Platform): EntityKey<T> {
+  private static propertyName<Entity>(meta: EntityMetadata<Entity>, prop: EntityKey<Entity>, platform?: Platform): EntityKey<Entity> {
     if (meta.properties[prop].serializedName) {
-      return meta.properties[prop].serializedName as EntityKey<T>;
+      return meta.properties[prop].serializedName as EntityKey<Entity>;
     }
 
     if (meta.properties[prop].primary && platform) {
-      return platform.getSerializedPrimaryKeyField(prop) as EntityKey<T>;
+      return platform.getSerializedPrimaryKeyField(prop) as EntityKey<Entity>;
     }
 
     return prop;
   }
 
-  private static processProperty<T extends object>(prop: EntityKey<T>, entity: T, raw: boolean): EntityValue<T> | undefined {
+  private static processProperty<Entity extends object>(prop: EntityKey<Entity>, entity: Entity, raw: boolean): EntityValue<Entity> | undefined {
     const wrapped = helper(entity);
     const property = wrapped.__meta.properties[prop];
     const serializer = property?.serializer;
@@ -131,11 +131,11 @@ export class EntityTransformer {
         return (entity[prop] as object[]).map(item => {
           const wrapped = item && helper(item);
           return wrapped ? wrapped.toJSON() : item;
-        }) as EntityValue<T>;
+        }) as EntityValue<Entity>;
       }
 
       const wrapped = entity[prop] && helper(entity[prop]!);
-      return wrapped ? wrapped.toJSON() as EntityValue<T> : entity[prop];
+      return wrapped ? wrapped.toJSON() as EntityValue<Entity> : entity[prop];
     }
 
     const customType = property?.customType;
@@ -144,38 +144,38 @@ export class EntityTransformer {
       return customType.toJSON(entity[prop], wrapped.__platform);
     }
 
-    return wrapped.__platform.normalizePrimaryKey(entity[prop] as unknown as IPrimaryKey) as unknown as EntityValue<T>;
+    return wrapped.__platform.normalizePrimaryKey(entity[prop] as unknown as IPrimaryKey) as unknown as EntityValue<Entity>;
   }
 
-  private static processEntity<T extends object>(prop: keyof T, entity: T, platform: Platform, raw: boolean): EntityValue<T> | undefined {
-    const child = entity[prop] as unknown as T | Reference<T>;
+  private static processEntity<Entity extends object>(prop: keyof Entity, entity: Entity, platform: Platform, raw: boolean): EntityValue<Entity> | undefined {
+    const child = entity[prop] as unknown as Entity | Reference<Entity>;
     const wrapped = helper(child);
 
     if (raw && wrapped.isInitialized() && child !== entity) {
-      return wrapped.toPOJO() as unknown as EntityValue<T>;
+      return wrapped.toPOJO() as unknown as EntityValue<Entity>;
     }
 
     if (wrapped.isInitialized() && (wrapped.__populated || !wrapped.__managed) && child !== entity && !wrapped.__lazyInitialized) {
       const args = [...wrapped.__meta.toJsonParams.map(() => undefined)];
-      return wrap(child).toJSON(...args) as EntityValue<T>;
+      return wrap(child).toJSON(...args) as EntityValue<Entity>;
     }
 
-    return platform.normalizePrimaryKey(wrapped.getPrimaryKey() as IPrimaryKey) as unknown as EntityValue<T>;
+    return platform.normalizePrimaryKey(wrapped.getPrimaryKey() as IPrimaryKey) as unknown as EntityValue<Entity>;
   }
 
-  private static processCollection<T>(prop: keyof T, entity: T, raw: boolean): EntityValue<T> | undefined {
+  private static processCollection<Entity>(prop: keyof Entity, entity: Entity, raw: boolean): EntityValue<Entity> | undefined {
     const col = entity[prop] as Collection<AnyEntity>;
 
     if (raw && col.isInitialized(true)) {
-      return col.getItems().map(item => wrap(item).toPOJO()) as EntityValue<T>;
+      return col.getItems().map(item => wrap(item).toPOJO()) as EntityValue<Entity>;
     }
 
     if (col.isInitialized(true) && col.shouldPopulate()) {
-      return col.toArray() as EntityValue<T>;
+      return col.toArray() as EntityValue<Entity>;
     }
 
     if (col.isInitialized()) {
-      return col.getIdentifiers() as EntityValue<T>;
+      return col.getIdentifiers() as EntityValue<Entity>;
     }
 
     return undefined;
diff --git a/packages/core/src/typings.ts b/packages/core/src/typings.ts
index 7ac9bfb1dd45..22ea42f424b2 100644
--- a/packages/core/src/typings.ts
+++ b/packages/core/src/typings.ts
@@ -121,19 +121,20 @@ export type FilterQuery<T> =
 export type QBFilterQuery<T = any> = FilterQuery<T> | Dictionary;
 
 export interface IWrappedEntity<
-  T extends object,
-  P extends string = string,
+  Entity extends object,
+  Hint extends string = string,
 > {
   isInitialized(): boolean;
   isTouched(): boolean;
   populated(populated?: boolean): void;
   populate<Hint extends string = never>(populate: AutoPath<T, Hint>[] | boolean, options?: EntityLoaderOptions<T, Hint>): Promise<Loaded<T, Hint>>;
-  init<P extends string = never>(populated?: boolean, populate?: Populate<T, P>, lockMode?: LockMode, connectionType?: ConnectionType): Promise<Loaded<T, P>>;
-  toReference(): Ref<T> & LoadedReference<Loaded<T, AddEager<T>>>;
-  toObject(ignoreFields?: string[]): EntityDTO<T>;
-  toJSON(...args: any[]): EntityDTO<T>;
-  toPOJO(): EntityDTO<T>;
-  assign(data: EntityData<T> | Partial<EntityDTO<T>>, options?: AssignOptions | boolean): T;
+  init<P extends string = never>(populated?: boolean, populate?: Populate<Entity, P>, lockMode?: LockMode, connectionType?: ConnectionType): Promise<Loaded<Entity, P>>;
+  toReference(): Ref<Entity> & LoadedReference<Loaded<Entity, AddEager<Entity>>>;
+  toObject<Ignored extends EntityKey<Entity>>(ignoreFields: Ignored[]): Omit<EntityDTO<Entity>, Ignored>;
+  toObject(...args: unknown[]): EntityDTO<Entity>;
+  toJSON(...args: any[]): EntityDTO<Entity>;
+  toPOJO(): EntityDTO<Entity>;
+  assign(data: EntityData<Entity> | Partial<EntityDTO<Entity>>, options?: AssignOptions | boolean): Entity;
   getSchema(): string | undefined;
   setSchema(schema?: string): void;
 }
diff --git a/tests/EntityHelper.mysql.test.ts b/tests/EntityHelper.mysql.test.ts
index 409a07515f73..0e26e33d0d3d 100644
--- a/tests/EntityHelper.mysql.test.ts
+++ b/tests/EntityHelper.mysql.test.ts
@@ -14,7 +14,10 @@ describe('EntityHelperMySql', () => {
   test(`toObject allows to hide PK (GH issue 644)`, async () => {
     const bar = FooBar2.create('fb');
     await orm.em.persistAndFlush(bar);
-    expect(wrap(bar).toObject(['id'])).not.toMatchObject({ id: bar.id, name: 'fb' });
+    const dto = wrap(bar).toObject(['id']);
+    expect(dto).not.toMatchObject({ id: bar.id, name: 'fb' });
+    // @ts-expect-error
+    expect(dto.id).toBeUndefined();
   });
 
   test(`toObject handles recursion in 1:1`, async () => {
diff --git a/tests/types.test.ts b/tests/types.test.ts
index bcd3d7977e12..543fbcf6e5bb 100644
--- a/tests/types.test.ts
+++ b/tests/types.test.ts
@@ -500,7 +500,9 @@ describe('check typings', () => {
   test('Loaded type with EntityDTO (with ORM base entities)', async () => {
     const b1 = createEntity<Loaded<Book>>();
     const o11 = wrap(b1).toObject();
-    const o12 = b1.toObject();
+    const o12 = b1.toObject(['id']);
+    // @ts-expect-error
+    const id10 = o12.id;
     // @ts-expect-error o11.publisher is now just number, as it's not populated
     const id11 = o11.publisher?.id;
     // @ts-expect-error o12.publisher is now just number, as it's not populated