diff --git a/src/reactions/gitlab/merge-request-opened.ts b/src/reactions/gitlab/merge-request-opened.ts
new file mode 100644
index 0000000..0d7ffb3
--- /dev/null
+++ b/src/reactions/gitlab/merge-request-opened.ts
@@ -0,0 +1,29 @@
+import { Config } from '../../config';
+import { Reaction, ReactionCanHandleOptions, ReactionHandleOptions } from '../github/reaction';
+import { MergeRequestPayload } from '../../schemas/gitlab/merge-request-payload';
+
+export class MergeRequestOpened extends Reaction<MergeRequestPayload> {
+	getStreamLabsMessage({ payload }: ReactionHandleOptions<MergeRequestPayload>): string {
+		return `*${payload.user.username}* just opened a merge request in *${payload.repository.name}*`;
+	}
+
+	getTwitchChatMessage({ payload }: ReactionHandleOptions<MergeRequestPayload>): string {
+		return `${payload.user.username} just opened a merge request in ${payload.repository.homepage}`;
+	}
+
+	canHandle({ payload, event, config }: ReactionCanHandleOptions<MergeRequestPayload>): boolean {
+		return (
+			event === 'Merge Request Hook' &&
+			payload.object_attributes.state === 'opened' &&
+			this.isAllowedByConfig(config, payload)
+		);
+	}
+
+	private isAllowedByConfig(config: Config | undefined, payload: MergeRequestPayload): boolean {
+		return (
+			!config ||
+			!config.IGNORE_PR_OPENED_BY.includes(payload.user.username) ||
+			config.IGNORE_PR_OPENED_BY.length === 0
+		);
+	}
+}
diff --git a/src/schemas/gitlab/merge-request-payload.ts b/src/schemas/gitlab/merge-request-payload.ts
new file mode 100644
index 0000000..cc44015
--- /dev/null
+++ b/src/schemas/gitlab/merge-request-payload.ts
@@ -0,0 +1,18 @@
+type url = string;
+
+export interface MergeRequestPayload {
+	user: {
+		name: string;
+		username: string;
+		avatar_url: url;
+	};
+	repository: {
+		name: string;
+		url: url;
+		description: string;
+		homepage: url;
+	};
+	object_attributes: {
+		state: 'merged' | 'created' | 'updated' | 'closed' | 'opened';
+	};
+}
diff --git a/test/reactions/gitlab/merge-request-opened.spec.ts b/test/reactions/gitlab/merge-request-opened.spec.ts
new file mode 100644
index 0000000..2af648a
--- /dev/null
+++ b/test/reactions/gitlab/merge-request-opened.spec.ts
@@ -0,0 +1,114 @@
+import { StreamLabsMock } from '../../__mocks__/StreamLabs';
+import { TwitchChatMock } from '../../__mocks__/TwitchChat';
+import { MergeRequestOpened } from '../../../src/reactions/gitlab/merge-request-opened';
+import { Config } from '../../../src/config';
+import { MergeRequestPayload } from '../../../src/schemas/gitlab/merge-request-payload';
+
+describe('MergeRequestOpened', () => {
+	const twitchChat = new TwitchChatMock();
+	const streamlabs = new StreamLabsMock();
+
+	describe('#canHandle', () => {
+		it("creates a new 'MergeRequestOpened' reaction", () => {
+			const subject = new MergeRequestOpened(twitchChat, streamlabs);
+
+			expect(subject).not.toBeNull();
+		});
+
+		it("returns true if the event is 'Merge Request Hook' and 'object_attributes.state' is 'opened'", () => {
+			const subject = new MergeRequestOpened(twitchChat, streamlabs);
+
+			const result = subject.canHandle({
+				event: 'Merge Request Hook',
+				payload: { object_attributes: { state: 'opened' } } as MergeRequestPayload,
+			});
+
+			expect(result).toEqual(true);
+		});
+
+		it("returns false if the event is 'Fork' and 'object_attributes.state' is 'opened'", () => {
+			const subject = new MergeRequestOpened(twitchChat, streamlabs);
+
+			const result = subject.canHandle({
+				event: 'Fork',
+				payload: { object_attributes: { state: 'opened' } } as MergeRequestPayload,
+			});
+
+			expect(result).toEqual(false);
+		});
+
+		it("returns false if the event is 'Merge Request Hook' and 'object_attributes.state' is 'merged'", () => {
+			const subject = new MergeRequestOpened(twitchChat, streamlabs);
+
+			const result = subject.canHandle({
+				event: 'Merge Request Hook',
+				payload: { object_attributes: { state: 'merged' } } as MergeRequestPayload,
+			});
+
+			expect(result).toEqual(false);
+		});
+
+		it("returns false if the event is 'Merge Request Hook', 'object_attributes.state' is 'opened' but the opener is in the ignore list", () => {
+			const subject = new MergeRequestOpened(twitchChat, streamlabs);
+
+			const result = subject.canHandle({
+				event: 'Merge Request Hook',
+				payload: {
+					object_attributes: { state: 'opened' },
+					user: { username: 'SantiMA10' },
+				} as MergeRequestPayload,
+				config: { IGNORE_PR_OPENED_BY: ['SantiMA10'] } as Config,
+			});
+
+			expect(result).toEqual(false);
+		});
+
+		it("returns true if the event is 'Merge Request Hook', 'object_attributes.state' is 'opened' and the 'IGNORE_PR_OPENED_BY' is empty", () => {
+			const subject = new MergeRequestOpened(twitchChat, streamlabs);
+
+			const result = subject.canHandle({
+				event: 'Merge Request Hook',
+				payload: {
+					object_attributes: { state: 'opened' },
+					user: { username: 'SantiMA10' },
+				} as MergeRequestPayload,
+				config: { IGNORE_PR_OPENED_BY: [] as string[] } as Config,
+			});
+
+			expect(result).toEqual(true);
+		});
+	});
+
+	describe('#handle', () => {
+		it('sends the expected message to TwitchChat', async () => {
+			const subject = new MergeRequestOpened(twitchChat, streamlabs);
+			const payload = {
+				object_attributes: { state: 'opened' },
+				user: { username: 'SantiMA10' },
+				repository: { homepage: 'https://gitlab.com/streamlabs/webhook' },
+			} as MergeRequestPayload;
+
+			const { twitchChat: response } = await subject.handle({ payload });
+
+			expect(response).toEqual({
+				notified: true,
+				message: `${payload.user.username} just opened a merge request in ${payload.repository.homepage}`,
+			});
+		});
+
+		it('sends the expected message to StreamLabs', async () => {
+			const subject = new MergeRequestOpened(twitchChat, streamlabs);
+			const payload = {
+				user: { username: 'SantiMA10' },
+				repository: { name: 'streamdevs/webhook' },
+			} as MergeRequestPayload;
+
+			const { streamlabs: response } = await subject.handle({ payload });
+
+			expect(response).toEqual({
+				notified: true,
+				message: `*${payload.user.username}* just opened a merge request in *${payload.repository.name}*`,
+			});
+		});
+	});
+});