We love celebrity BFFs (Katy Perry and RiRi, we're lookin' at you), but there's nothing we're obsessed with more than Hollywood's many bromances. Today, news broke that one of the most creative duos in the biz (who also happen to be best pals) have an exciting project in the works: Matt Damon and Ben Affleck are producing a brand new sitcom based on family life. With these two onboard, we're sure it'll be a must-watch. With that in mind, here are some of our all-time fave Hollywood bromances (some of whom met on the set). Aww. Who says work and (b)romance don't mix?!