The success of a movie often depends on the chemistry of the two leads—whether those leads are two men, two women, or both. A lot of times, that great chemistry translates into lifelong friendships. Tom Hiddleston and Chris Hemsworth are both friendly offscreen as they were onscreen as Thor and Loki in the Marvel Universe. However, some frienships began before the actors became famous. Just look at Ben Affleck and Matt Damon who have now been friends four times longer than the age at which they met (hint: they were 8 and 10, respectively, for those of you who hate word problems), and won an Oscar together when they were still in their 20s.
Do you like it when co-stars become best friends after filming together? Since Sunday is International Friendship Day, who are some of your favorite Hollywood Friendships?