diff --git a/packages/replay-internal/src/integration.ts b/packages/replay-internal/src/integration.ts
index 6db78dced270..c91fad87ff20 100644
--- a/packages/replay-internal/src/integration.ts
+++ b/packages/replay-internal/src/integration.ts
@@ -320,7 +320,20 @@ export class Replay implements Integration {
   /** Setup the integration. */
   private _setup(client: Client): void {
     // Client is not available in constructor, so we need to wait until setupOnce
-    const finalOptions = loadReplayOptionsFromClient(this._initialOptions, client);
+    const clientOptions = client.getOptions();
+    const finalOptions = loadReplayOptionsFromClient(this._initialOptions, clientOptions as BrowserClientReplayOptions);
+
+    if (clientOptions._experiments?.enableLogs) {
+      client.on('beforeCaptureLog', log => {
+        const replayId = this.getReplayId();
+        if (replayId) {
+          log.attributes = {
+            ...log.attributes,
+            'replay.id': replayId,
+          };
+        }
+      });
+    }
 
     this._replay = new ReplayContainer({
       options: finalOptions,
@@ -350,9 +363,10 @@ export class Replay implements Integration {
 }
 
 /** Parse Replay-related options from SDK options */
-function loadReplayOptionsFromClient(initialOptions: InitialReplayPluginOptions, client: Client): ReplayPluginOptions {
-  const opt = client.getOptions() as BrowserClientReplayOptions;
-
+function loadReplayOptionsFromClient(
+  initialOptions: InitialReplayPluginOptions,
+  opt: BrowserClientReplayOptions,
+): ReplayPluginOptions {
   const finalOptions: ReplayPluginOptions = {
     sessionSampleRate: 0,
     errorSampleRate: 0,
diff --git a/packages/replay-internal/test/integration/logAttributes.test.ts b/packages/replay-internal/test/integration/logAttributes.test.ts
new file mode 100644
index 000000000000..338ea9838e46
--- /dev/null
+++ b/packages/replay-internal/test/integration/logAttributes.test.ts
@@ -0,0 +1,164 @@
+/**
+ * @vitest-environment jsdom
+ */
+
+import type { Log } from '@sentry/core';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { mockSdk } from '../index';
+
+describe('Integration | logAttributes', () => {
+  beforeEach(() => {
+    vi.resetModules();
+  });
+
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  describe('log attributes with replay ID', () => {
+    it('adds replay ID to log attributes when replay is enabled and has a session', async () => {
+      const { replay, integration, client } = await mockSdk({
+        replayOptions: {},
+        sentryOptions: {
+          _experiments: { enableLogs: true },
+          replaysSessionSampleRate: 1.0,
+        },
+      });
+
+      // Start replay to create a session
+      replay.start();
+      expect(replay.isEnabled()).toBe(true);
+      expect(integration.getReplayId()).toBeDefined();
+
+      const replayId = integration.getReplayId();
+
+      // Mock the client and emit a log event
+      const log: Log = {
+        level: 'info',
+        message: 'test log message',
+        attributes: { 'existing.attr': 'value' },
+      };
+
+      client.emit('beforeCaptureLog', log);
+
+      expect(log.attributes).toEqual({
+        'existing.attr': 'value',
+        'replay.id': replayId,
+      });
+    });
+
+    it('preserves existing log attributes when adding replay ID', async () => {
+      const { replay, integration, client } = await mockSdk({
+        replayOptions: {},
+        sentryOptions: {
+          _experiments: { enableLogs: true },
+          replaysSessionSampleRate: 1.0,
+        },
+      });
+
+      // Start replay to create a session
+      replay.start();
+      const replayId = integration.getReplayId();
+
+      const log: Log = {
+        level: 'error',
+        message: 'error log message',
+        attributes: {
+          'user.id': 'test-user',
+          'request.id': 'req-123',
+          module: 'auth',
+        },
+      };
+
+      client.emit('beforeCaptureLog', log);
+
+      expect(log.attributes).toEqual({
+        'user.id': 'test-user',
+        'request.id': 'req-123',
+        module: 'auth',
+        'replay.id': replayId,
+      });
+    });
+
+    it('does not add replay ID when replay is not enabled', async () => {
+      const { replay, client } = await mockSdk({
+        replayOptions: {},
+        sentryOptions: {
+          _experiments: { enableLogs: true },
+          replaysSessionSampleRate: 0.0, // Disabled
+        },
+      });
+
+      // Replay should not be enabled
+      expect(replay.isEnabled()).toBe(false);
+
+      const log: Log = {
+        level: 'info',
+        message: 'test log message',
+        attributes: { 'existing.attr': 'value' },
+      };
+
+      client.emit('beforeCaptureLog', log);
+
+      // Replay ID should not be added
+      expect(log.attributes).toEqual({
+        'existing.attr': 'value',
+      });
+    });
+
+    it('does not register log handler when enableLogs experiment is disabled', async () => {
+      const { replay, client } = await mockSdk({
+        replayOptions: {},
+        sentryOptions: {
+          // enableLogs experiment is not set (defaults to false)
+          replaysSessionSampleRate: 1.0,
+        },
+      });
+
+      replay.start();
+
+      const log: Log = {
+        level: 'info',
+        message: 'test log message',
+        attributes: { 'existing.attr': 'value' },
+      };
+
+      client.emit('beforeCaptureLog', log);
+
+      // Replay ID should not be added since the handler wasn't registered
+      expect(log.attributes).toEqual({
+        'existing.attr': 'value',
+      });
+    });
+
+    it('works with buffer mode replay', async () => {
+      const { replay, integration, client } = await mockSdk({
+        replayOptions: {},
+        sentryOptions: {
+          _experiments: { enableLogs: true },
+          replaysSessionSampleRate: 0.0,
+          replaysOnErrorSampleRate: 1.0, // Buffer mode
+        },
+      });
+
+      // Start buffering mode
+      replay.startBuffering();
+      expect(integration.getRecordingMode()).toBe('buffer');
+
+      const replayId = integration.getReplayId();
+      expect(replayId).toBeDefined();
+
+      const log: Log = {
+        level: 'warn',
+        message: 'warning message',
+        attributes: {},
+      };
+
+      client.emit('beforeCaptureLog', log);
+
+      expect(log.attributes).toEqual({
+        'replay.id': replayId,
+      });
+    });
+  });
+});
diff --git a/packages/replay-internal/test/mocks/mockSdk.ts b/packages/replay-internal/test/mocks/mockSdk.ts
index 9ec20553529b..8a1751827d14 100644
--- a/packages/replay-internal/test/mocks/mockSdk.ts
+++ b/packages/replay-internal/test/mocks/mockSdk.ts
@@ -47,6 +47,7 @@ class MockTransport implements Transport {
 export async function mockSdk({ replayOptions, sentryOptions, autoStart = true }: MockSdkParams = {}): Promise<{
   replay: ReplayContainer;
   integration: ReplayIntegration;
+  client: ReturnType<typeof init>;
 }> {
   const { Replay } = await import('../../src/integration');
 
@@ -92,5 +93,5 @@ export async function mockSdk({ replayOptions, sentryOptions, autoStart = true }
 
   const replay = replayIntegration['_replay']!;
 
-  return { replay, integration: replayIntegration };
+  return { replay, integration: replayIntegration, client };
 }