10. Jon Favreau a Friend
When Friends first went on the air, another actor who was blowing up at the time was Jon Favreau. He’d just been in the movie, Swingers, which was a hot ticket. Producers for Friends, no surprise, wanted to ride some of that light so they offered him a role on the show playing Chandler. While it never hurt his career—Favreau went on to direct and act in many well-known movies—he left the spot open for Matthew Perry.