Paul Rudd and Jon Hamm are great friends, but it wasn't always that way.
Their bromance was unable to blossom because of a significant roadblock: a girl.
When Rudd was in college he used to go down to St. Louis with his roommate (who was childhood friends with Hamm) to hang out with the future Mad Men star. The issue was that Paul would bring his then girlfriend who happened to be Jon's ex.
The Ant-Man star recalls, "Jon and I knew each other back then, though we both sort of liked the same girl, so I was not so crazy about Jon."