When Bill Murray replaced Chevy Chase in the Not Ready for Primetime Players in 1976, no one knew he would go on to movie stardom. But he took his quick wit and willingness to go the extra mile for a laugh that made Caddyshack, Ghostbusters, and Groundhog Day the classics they are. And he's had quite a few dramatic roles as well, like The Razor's Edge and Lost in Translation. And he's not slowing down at all.
You have to wonder what Coppolla would have done if her contractless leading man had decided not to do the movie when she already had the rest of the cast and crew assembled. Murray's IMDb page lists 85 acting credits, but the trivia in this illustrated list at TVOM focuses on the Bill Murray movies you've most likely seen.