On the old board I had started this thread but only with actors. This was the first post:
The currently most active one is probably Ian McKellan and Patrick Stewart. Mostly actors who may or may not have worked together on productions, but were also friends off screen. Some actors just had great on screen bromances with each other on projects.
Pitt and Clooney
Dean Martin and Jerry Lewis
Ben Affleck and Matt Damon
Beatty and Nicholson
Leonard Nimoy and William Shatner
Paul Michael Glaser and David Soul ^ with the other bromancers who played Starsky&Hutch on the big screen, Stiller and Wilson.
Ben Stiller and Owen Wilson
Paul Newman and Robert Redford
Tony Curtis and Roger Moore
Ben Murphy and Pete Duel (not great friends in real life, but great chemistry on screen)
Reason for reposting/restarting this old thread was the Nadal/Federer clip. I've been getting more stuff on them in my feed and I never realized they had such a (tennis) bromance. It's really cute, actually.