Minnie Driver
Minnie Driver, though older now, is best known for her role in 1997's Good Will Hunting. That career also kicked off Matt Damon and Ben Affleck's careers. Driver has also won a Golden Glob and an Emmy award for her role on the TV series, The Riches.
Minnie Who?
Sadly, outside of Good Will Hunting, Driver was never able to establish herself as a household name. That film is pretty much the only one that gave her any sort of legitimate credibility. Unfortunately, she's not close with her co-stars today.