Nathan Fillion, who you might know from Castle and Firefly, wanted to portray Angel in the iconic series Buffy the Vampire Slayer.

Fillion said, "You understand your job as an actor is to audition. Your job is to go out there and look for work... When Joss found out that I auditioned for Angel — he didn’t know — he felt bad. He said, “I don’t remember you.” I told him not to worry, I never made the first cut... And when Firefly was canceled, he said, “Come and do the last 5 episodes of Buffy for me.”