Tim Matheson(I)

When he originally auditioned for Animal House (1978), the producers wanted him to play one of the no-nonsense. straight-laced Omegas. However, he adamantly refused, saying, "I'm tired of playing it straight," and sought a role as one of the hard-partying, fun-loving Deltas. He succeeded and got the role of Otter, one of the most fun-loving Deltas of the whole film.

I've stolen something from every director I've worked with. As an actor and a director, you steal from the best. And there's no reason why any shame should be attached to it.