In another twist in their long-running feud, Damon revealed some shocking news in an epic sketch on Monday's 'Jimmy Kimmel Live.'
The Oscar winner also gives baby advice to pal George Clooney.
'The Great Wall' star tells ET's Kevin Frazier George and Amal are going to be great parents.
The 'Great Wall' star recounts watching the Patriots' comeback with BFF Ben Affleck.
The 46-year-old actor is really good at keeping secrets!
The actor and the late night host have been fake feuding for years and Matt finally made it on the show.
The 'Vanderpump Rules' star opened up to host Andy Cohen about her 'tall' new beau on Monday's 'Watch What Happens Live.'
The Damon-Kimmel feud is still going strong.
Ready for Sunday's match between the New England Patriots and Atlanta Falcons? ET's got you covered!
Affleck opened up to ET at Monday's Live by Night premiere, acknowledging the people he relies on most when the going gets tough.
The 'Live by Night' star opened up to ET about the people he relies on most when the going gets tough.
The 'Live by Night' star opened up to ET about the thrill he felt watching his younger brother take home a Golden Globe.
ET was in the middle of all the madness at the hottest after-parties in town!
Casey Affleck gushed over his 'Manchester by the Sea' co-star on stage at the 2017 Golden Globe Awards.
