123Movies was a popular pirate streaming site that hosted thousands of movies and TV shows for free, including both Tron films. Users could watch Tron (1982) or Tron: Legacy without paying. The site changed domain names multiple times (123movies.to, .is, .ly, etc.) to evade authorities.
If you want to watch Tron legally today, it’s available on Disney+, Amazon Prime Video (rent/buy), or Apple TV. tron 123 movies
Here’s the long story short: