You can watch "Tron: Legacy" streaming on Disney Plus. It is also available to buy or rent on platforms like Amazon Video, Apple TV, Fandango At Home, and Google Play. There are no free streaming options currently for this movie, but purchasing or renting digitally is possible.
If you are interested in the latest Tron film, "Tron: Ares" which was released in October 2025, it is currently only in theaters. It is expected to be available for digital purchase or rental on platforms like Prime Video and Apple TV in December 2025, with streaming on Disney Plus anticipated in early 2026.