To cast your laptop to a TV wirelessly, ensure both devices are connected to the same Wi-Fi network. On Windows, use the “Cast” or “Project” feature from the action center or display settings. On Mac, use AirPlay if you have an Apple TV or a compatible smart TV. Alternatively, use streaming devices like Chromecast, where you can cast your screen via the Chrome browser or compatible apps. Follow on-screen prompts to connect and start mirroring your laptop display to the TV.