Matt Damon has cameos in both Disney's and Fox's MCU. He played the Asgardian actor playing Loki in Thor Ragnarok(2017), and "Redneck #1" in Deadpool 2 (2018). : r/MovieDetails
Every Matt Damon Cameo Ever - YouTube
Surprising Celebrity Cameos in Movies
EuroTrip (2004) - IMDb
Here's Why Matt Damon Shaved His Head and Sang "Scotty Doesn't Know" in ' EuroTrip'