Damon and Kimmel have been feuding for years, and Affleck simply wanted to help them "bury the hatchet."
The actor hilariously explained how "mortifying" it was to dress up in character at his son's 4th birthday party.
You have to see this to believe it.
From where to watch to who's nominated, ET's got you covered on all the gotta-know-it info ahead of Sunday's show.
Matt Damon is RIPPED in the fifth film of the franchise.
Get exclusive details about the upcoming 'Bourne' movie.
ET caught up with 'The Danish Girl' star at the 2016 SAG Awards.
Security was so tight at the Golden Globes that ET found The Martian star holding onto his ticket for dear life to make sure he got in.
We are all Jennifer Lawrence in this moment.
From standing ovations to awkward bear costumes, here are the Golden Globes moments you'll be talking about tomorrow.
Don't mess with Damon and Affleck!
We are all J.Law in this moment.
Gervais made the joke while introducing Ben's longtime friend, Matt Damon.
ET has been at every Golden Globe Awards of the past 35 years, and now we're sharing some of our most priceless moments.