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Launch the **TikTok** app on your mobile device. Ensure you are logged into your account.
Browse through your **For You** page or search for a specific user. Tap on the video you want to duet.
Tap on the **Share** icon (an arrow pointing right) on the right side of the screen. Then, select the **Duet** option from the menu that appears.
You will see a split-screen with the original video. Press the **record** button to start capturing your duet. You can add effects or filters as needed.
After recording, tap on **Next**. Add a caption, adjust your settings, and then tap **Post** to share your duet with your followers.