diff --git a/packages/replay/jest.setup.ts b/packages/replay/jest.setup.ts
index f7d2a1248c0c..b6031d4f3e46 100644
--- a/packages/replay/jest.setup.ts
+++ b/packages/replay/jest.setup.ts
@@ -1,6 +1,6 @@
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 import { getCurrentHub } from '@sentry/core';
-import { Transport } from '@sentry/types';
+import { ReplayRecordingData,Transport } from '@sentry/types';
 
 import type { ReplayContainer, Session } from './src/types';
 
@@ -55,7 +55,7 @@ type SentReplayExpected = {
   replayEventPayload?: ReplayEventPayload;
   recordingHeader?: RecordingHeader;
   recordingPayloadHeader?: RecordingPayloadHeader;
-  events?: string | Uint8Array;
+  events?: ReplayRecordingData;
 };
 
 // eslint-disable-next-line @typescript-eslint/explicit-function-return-type
diff --git a/packages/replay/src/eventBuffer.ts b/packages/replay/src/eventBuffer.ts
index b83942be4f67..1d670506de67 100644
--- a/packages/replay/src/eventBuffer.ts
+++ b/packages/replay/src/eventBuffer.ts
@@ -2,6 +2,7 @@
 // TODO: figure out member access types and remove the line above
 
 import { captureException } from '@sentry/core';
+import { ReplayRecordingData } from '@sentry/types';
 import { logger } from '@sentry/utils';
 
 import type { EventBuffer, RecordingEvent, WorkerRequest, WorkerResponse } from './types';
@@ -95,7 +96,7 @@ export class EventBufferCompressionWorker implements EventBuffer {
     return this._eventBufferItemLength;
   }
 
-  public async addEvent(event: RecordingEvent, isCheckout?: boolean): Promise<string | Uint8Array> {
+  public async addEvent(event: RecordingEvent, isCheckout?: boolean): Promise<ReplayRecordingData> {
     if (isCheckout) {
       // This event is a checkout, make sure worker buffer is cleared before
       // proceeding.
@@ -159,7 +160,7 @@ export class EventBufferCompressionWorker implements EventBuffer {
     });
   }
 
-  private _sendEventToWorker(event: RecordingEvent): Promise<string | Uint8Array> {
+  private _sendEventToWorker(event: RecordingEvent): Promise<ReplayRecordingData> {
     const promise = this._postMessage({
       id: this._getAndIncrementId(),
       method: 'addEvent',
diff --git a/packages/replay/src/replay.ts b/packages/replay/src/replay.ts
index f2e7e4f78162..7031e60f439d 100644
--- a/packages/replay/src/replay.ts
+++ b/packages/replay/src/replay.ts
@@ -1,6 +1,6 @@
 /* eslint-disable max-lines */ // TODO: We might want to split this file up
 import { addGlobalEventProcessor, captureException, getCurrentHub, setContext } from '@sentry/core';
-import { Breadcrumb, Event } from '@sentry/types';
+import { Breadcrumb, ReplayEvent } from '@sentry/types';
 import { addInstrumentationHandler, logger } from '@sentry/utils';
 import debounce from 'lodash.debounce';
 import { EventType, record } from 'rrweb';
@@ -927,7 +927,7 @@ export class ReplayContainer implements ReplayContainerInterface {
       return;
     }
 
-    const baseEvent: Event = {
+    const baseEvent: ReplayEvent = {
       // @ts-ignore private api
       type: REPLAY_EVENT_NAME,
       ...(includeReplayStartTimestamp ? { replay_start_timestamp: initialTimestamp / 1000 } : {}),
diff --git a/packages/replay/src/types.ts b/packages/replay/src/types.ts
index f9da9bc42cb8..c331273b135e 100644
--- a/packages/replay/src/types.ts
+++ b/packages/replay/src/types.ts
@@ -1,3 +1,5 @@
+import { ReplayRecordingData } from '@sentry/types';
+
 import type { eventWithTime, recordOptions } from './types/rrweb';
 
 export type RecordingEvent = eventWithTime;
@@ -47,7 +49,7 @@ export interface WorkerResponse {
   id: number;
   method: string;
   success: boolean;
-  response: string | Uint8Array;
+  response: ReplayRecordingData;
 }
 
 export interface SampleRates {
@@ -211,7 +213,7 @@ export interface EventBuffer {
   readonly length: number;
   destroy(): void;
   addEvent(event: RecordingEvent, isCheckout?: boolean): void;
-  finish(): Promise<string | Uint8Array>;
+  finish(): Promise<ReplayRecordingData>;
 }
 
 export type AddUpdateCallback = () => boolean | void;
diff --git a/packages/replay/src/util/createPayload.ts b/packages/replay/src/util/createPayload.ts
index 6567703022ef..b3b6615b1b40 100644
--- a/packages/replay/src/util/createPayload.ts
+++ b/packages/replay/src/util/createPayload.ts
@@ -1,3 +1,5 @@
+import { ReplayRecordingData } from '@sentry/types';
+
 import type { RecordedEvents } from '../types';
 
 export function createPayload({
@@ -6,7 +8,7 @@ export function createPayload({
 }: {
   events: RecordedEvents;
   headers: Record<string, unknown>;
-}): string | Uint8Array {
+}): ReplayRecordingData {
   let payloadWithSequence;
 
   // XXX: newline is needed to separate sequence id from events
diff --git a/packages/replay/src/util/createReplayEnvelope.ts b/packages/replay/src/util/createReplayEnvelope.ts
index 8850974ec18b..3d950e06cb29 100644
--- a/packages/replay/src/util/createReplayEnvelope.ts
+++ b/packages/replay/src/util/createReplayEnvelope.ts
@@ -1,25 +1,22 @@
-import { DsnComponents, Envelope, Event } from '@sentry/types';
+import { DsnComponents, ReplayEnvelope, ReplayEvent, ReplayRecordingData } from '@sentry/types';
 import { createEnvelope, createEventEnvelopeHeaders, getSdkMetadataForEnvelopeHeader } from '@sentry/utils';
 
 export function createReplayEnvelope(
-  replayEvent: Event,
-  payloadWithSequence: string | Uint8Array,
+  replayEvent: ReplayEvent,
+  recordingData: ReplayRecordingData,
   dsn: DsnComponents,
   tunnel?: string,
-): Envelope {
-  return createEnvelope(
+): ReplayEnvelope {
+  return createEnvelope<ReplayEnvelope>(
     createEventEnvelopeHeaders(replayEvent, getSdkMetadataForEnvelopeHeader(replayEvent), tunnel, dsn),
     [
-      // @ts-ignore New types
       [{ type: 'replay_event' }, replayEvent],
       [
         {
-          // @ts-ignore setting envelope
           type: 'replay_recording',
-          length: payloadWithSequence.length,
+          length: recordingData.length,
         },
-        // @ts-ignore: Type 'string' is not assignable to type 'ClientReport'.ts(2322)
-        payloadWithSequence,
+        recordingData,
       ],
     ],
   );
diff --git a/packages/replay/src/util/getReplayEvent.ts b/packages/replay/src/util/getReplayEvent.ts
index b6e839517441..3df3f3c5f3ac 100644
--- a/packages/replay/src/util/getReplayEvent.ts
+++ b/packages/replay/src/util/getReplayEvent.ts
@@ -1,5 +1,5 @@
 import { Scope } from '@sentry/core';
-import { Client, Event } from '@sentry/types';
+import { Client, ReplayEvent } from '@sentry/types';
 
 export async function getReplayEvent({
   client,
@@ -10,11 +10,11 @@ export async function getReplayEvent({
   client: Client;
   scope: Scope;
   replayId: string;
-  event: Event;
-}): Promise<Event | null> {
+  event: ReplayEvent;
+}): Promise<ReplayEvent | null> {
   // XXX: This event does not trigger `beforeSend` in SDK
   // @ts-ignore private api
-  const preparedEvent: Event | null = await client._prepareEvent(event, { event_id }, scope);
+  const preparedEvent: ReplayEvent | null = await client._prepareEvent(event, { event_id }, scope);
 
   if (preparedEvent) {
     // extract the SDK name because `client._prepareEvent` doesn't add it to the event
diff --git a/packages/replay/test/unit/util/createReplayEnvelope.test.ts b/packages/replay/test/unit/util/createReplayEnvelope.test.ts
index 76fd3348cecb..456c0863e3fc 100644
--- a/packages/replay/test/unit/util/createReplayEnvelope.test.ts
+++ b/packages/replay/test/unit/util/createReplayEnvelope.test.ts
@@ -1,4 +1,4 @@
-import { Event } from '@sentry/types';
+import { ReplayEvent } from '@sentry/types';
 import { makeDsn } from '@sentry/utils';
 
 import { createReplayEnvelope } from '../../../src/util/createReplayEnvelope';
@@ -6,7 +6,8 @@ import { createReplayEnvelope } from '../../../src/util/createReplayEnvelope';
 describe('createReplayEnvelope', () => {
   const REPLAY_ID = 'MY_REPLAY_ID';
 
-  const replayEvent = {
+  const replayEvent: ReplayEvent = {
+    // @ts-ignore private api
     type: 'replay_event',
     timestamp: 1670837008.634,
     error_ids: ['errorId'],
@@ -41,7 +42,7 @@ describe('createReplayEnvelope', () => {
   });
 
   it('creates an envelope for a given Replay event', () => {
-    const envelope = createReplayEnvelope(replayEvent as Event, payloadWithSequence, dsn);
+    const envelope = createReplayEnvelope(replayEvent, payloadWithSequence, dsn);
 
     expect(envelope).toEqual([
       {
@@ -73,7 +74,7 @@ describe('createReplayEnvelope', () => {
   });
 
   it('creates an envelope with the `dsn` key in the header if `tunnel` is specified', () => {
-    const envelope = createReplayEnvelope(replayEvent as Event, payloadWithSequence, dsn, '/my-tunnel-endpoint');
+    const envelope = createReplayEnvelope(replayEvent, payloadWithSequence, dsn, '/my-tunnel-endpoint');
 
     expect(envelope).toEqual([
       {
diff --git a/packages/replay/test/unit/util/getReplayEvent.test.ts b/packages/replay/test/unit/util/getReplayEvent.test.ts
index fadddae05d3b..31ab71747771 100644
--- a/packages/replay/test/unit/util/getReplayEvent.test.ts
+++ b/packages/replay/test/unit/util/getReplayEvent.test.ts
@@ -1,6 +1,6 @@
 import { BrowserClient } from '@sentry/browser';
 import { getCurrentHub, Hub, Scope } from '@sentry/core';
-import { Client, Event } from '@sentry/types';
+import { Client, ReplayEvent } from '@sentry/types';
 
 import { REPLAY_EVENT_NAME } from '../../../src/constants';
 import { getReplayEvent } from '../../../src/util/getReplayEvent';
@@ -25,7 +25,7 @@ describe('getReplayEvent', () => {
     expect(scope).toBeDefined();
 
     const replayId = 'replay-ID';
-    const event: Event = {
+    const event: ReplayEvent = {
       // @ts-ignore private api
       type: REPLAY_EVENT_NAME,
       timestamp: 1670837008.634,
@@ -33,6 +33,7 @@ describe('getReplayEvent', () => {
       trace_ids: ['trace-ID'],
       urls: ['https://sentry.io/'],
       replay_id: replayId,
+      event_id: replayId,
       segment_id: 3,
     };
 
diff --git a/packages/types/src/datacategory.ts b/packages/types/src/datacategory.ts
index 747db363e78e..a462957b3ccd 100644
--- a/packages/types/src/datacategory.ts
+++ b/packages/types/src/datacategory.ts
@@ -19,4 +19,7 @@ export type DataCategory =
   // SDK internal event, like client_reports
   | 'internal'
   // Profile event type
-  | 'profile';
+  | 'profile'
+  // Replay event types
+  | 'replay_event'
+  | 'replay_recording';
diff --git a/packages/types/src/envelope.ts b/packages/types/src/envelope.ts
index 6eb27dc0c4c8..74cb2764b7e3 100644
--- a/packages/types/src/envelope.ts
+++ b/packages/types/src/envelope.ts
@@ -1,6 +1,7 @@
 import { ClientReport } from './clientreport';
 import { DsnComponents } from './dsn';
 import { Event } from './event';
+import { ReplayEvent, ReplayRecordingData } from './replay';
 import { SdkInfo } from './sdkinfo';
 import { Session, SessionAggregates } from './session';
 import { Transaction } from './transaction';
@@ -27,7 +28,9 @@ export type EnvelopeItemType =
   | 'transaction'
   | 'attachment'
   | 'event'
-  | 'profile';
+  | 'profile'
+  | 'replay_event'
+  | 'replay_recording';
 
 export type BaseEnvelopeHeaders = {
   [key: string]: unknown;
@@ -62,6 +65,8 @@ type UserFeedbackItemHeaders = { type: 'user_report' };
 type SessionItemHeaders = { type: 'session' };
 type SessionAggregatesItemHeaders = { type: 'sessions' };
 type ClientReportItemHeaders = { type: 'client_report' };
+type ReplayEventItemHeaders = { type: 'replay_event' };
+type ReplayRecordingItemHeaders = { type: 'replay_recording'; length: number };
 
 export type EventItem = BaseEnvelopeItem<EventItemHeaders, Event>;
 export type AttachmentItem = BaseEnvelopeItem<AttachmentItemHeaders, string | Uint8Array>;
@@ -70,14 +75,18 @@ export type SessionItem =
   | BaseEnvelopeItem<SessionItemHeaders, Session>
   | BaseEnvelopeItem<SessionAggregatesItemHeaders, SessionAggregates>;
 export type ClientReportItem = BaseEnvelopeItem<ClientReportItemHeaders, ClientReport>;
+type ReplayEventItem = BaseEnvelopeItem<ReplayEventItemHeaders, ReplayEvent>;
+type ReplayRecordingItem = BaseEnvelopeItem<ReplayRecordingItemHeaders, ReplayRecordingData>;
 
 export type EventEnvelopeHeaders = { event_id: string; sent_at: string; trace?: DynamicSamplingContext };
 type SessionEnvelopeHeaders = { sent_at: string };
 type ClientReportEnvelopeHeaders = BaseEnvelopeHeaders;
+type ReplayEnvelopeHeaders = BaseEnvelopeHeaders;
 
 export type EventEnvelope = BaseEnvelope<EventEnvelopeHeaders, EventItem | AttachmentItem | UserFeedbackItem>;
 export type SessionEnvelope = BaseEnvelope<SessionEnvelopeHeaders, SessionItem>;
 export type ClientReportEnvelope = BaseEnvelope<ClientReportEnvelopeHeaders, ClientReportItem>;
+export type ReplayEnvelope = [ReplayEnvelopeHeaders, [ReplayEventItem, ReplayRecordingItem]];
 
-export type Envelope = EventEnvelope | SessionEnvelope | ClientReportEnvelope;
+export type Envelope = EventEnvelope | SessionEnvelope | ClientReportEnvelope | ReplayEnvelope;
 export type EnvelopeItem = Envelope[1][number];
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index c07403474a73..56d5379f9e34 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -19,6 +19,7 @@ export type {
   EventEnvelope,
   EventEnvelopeHeaders,
   EventItem,
+  ReplayEnvelope,
   SessionEnvelope,
   SessionItem,
   UserFeedbackItem,
@@ -39,6 +40,7 @@ export type { ExtractedNodeRequestData, HttpHeaderValue, Primitive, WorkerLocati
 export type { ClientOptions, Options } from './options';
 export type { Package } from './package';
 export type { PolymorphicEvent, PolymorphicRequest } from './polymorphics';
+export type { ReplayEvent, ReplayRecordingData } from './replay';
 export type { QueryParams, Request } from './request';
 export type { Runtime } from './runtime';
 export type { CaptureContext, Scope, ScopeContext } from './scope';
diff --git a/packages/types/src/replay.ts b/packages/types/src/replay.ts
new file mode 100644
index 000000000000..1bec7202ecdc
--- /dev/null
+++ b/packages/types/src/replay.ts
@@ -0,0 +1,19 @@
+import { Event } from './event';
+
+/**
+ * NOTE: These types are still considered Beta and subject to change.
+ * @hidden
+ */
+export interface ReplayEvent extends Event {
+  urls: string[];
+  error_ids: string[];
+  trace_ids: string[];
+  replay_id: string;
+  segment_id: number;
+}
+
+/**
+ * NOTE: These types are still considered Beta and subject to change.
+ * @hidden
+ */
+export type ReplayRecordingData = string | Uint8Array;
diff --git a/packages/utils/src/envelope.ts b/packages/utils/src/envelope.ts
index 3b9e0e374b53..5cb1a675645e 100644
--- a/packages/utils/src/envelope.ts
+++ b/packages/utils/src/envelope.ts
@@ -187,6 +187,8 @@ const ITEM_TYPE_TO_DATA_CATEGORY_MAP: Record<EnvelopeItemType, DataCategory> = {
   client_report: 'internal',
   user_report: 'default',
   profile: 'profile',
+  replay_event: 'replay_event',
+  replay_recording: 'replay_recording',
 };
 
 /**