Speaking with ET's Carly Steel at the premiere of Manchester By The Sea at the Samuel Goldwyn Theater in Beverly Hills, California, on Monday, Damon – who starred as pickpocket Linus Caldwell alongside Brad Pitt and George Clooney in Ocean's Eleven, Twelve and Thirteen -- revealed that he's going to be shooting a cameo.
"I'm doing a little bit in the movie," Damon shared. "I haven't read it yet, but the cast is phenomenal and I'm excited to see what those women do with it. It's going to be fun."
Ocean's Eight, which is set in the same universe as Damon's Las Vegas heist trilogy, is set to star Anne Hathaway, Sandra Bullock, Helena Bonham Carter, Cate Blanchett, Sarah Paulson, Rihanna, Mindy Kaling and rapper Awkwafina.
As for Manchester by the Sea, Damon couldn't help but heap praise on star and frequent collaborator Casey Affleck.
"We clash in a really good way creatively," explained Damon, who's been friends with Affleck since childhood and served as a producer on his latest film. "He just cares so much. He takes every moment so personally and seriously and that's why he's one of the best actors in the world and I'm really, really proud of him. I couldn't be happier for what he did in this movie."