19. The Jerk
Starring Steve Martin, this is a story about a man who grew up in Mississippi as an adopted son of a black family, but on his 18th birthday decided he wanted to see the rest of the world and set off to St. Louis. Not the brightest bulb in the shed, he got into plenty of shenanigans. Fresh off of the SNL stage, this movie is what established Martin as an on-screen comedian.