To activate STARZ on Roku, install the app, note the activation code, visit starz.com/activate, enter the code, and sign in with your STARZ account to start streaming.
 
 
How do I Activate Starz on Roku?

To activate STARZ on Roku, follow these steps:

  1. Install the STARZ app on your Roku device from the Roku Channel Store.

  2. Open the STARZ app and select "Sign In."

  3. Note the activation code that appears on your TV screen.

  4. On a computer or mobile browser, go to starz.com/activate.

  5. Enter the activation code from your Roku screen and sign in with your STARZ account.

  6. After activation, you can start streaming STARZ content on your Roku.