To activate Disney+ on multiple devices, start by logging into your account on each device. Open the Disney+ app, select "Log In," and enter your credentials. You may be prompted to visit disneyplus.com login/begin and enter an 8-digit code displayed on your screen. Once entered, your device will be linked to your account, allowing you to stream Disney+ content seamlessly across all devices. Repeat this process for each additional device. Make sure your subscription is active to enjoy uninterrupted access to your favorite Disney, Marvel, and Star Wars content anywhere, anytime!