One of the more underrated actors of our generation turns 41 today. Happy birthday, Paul Giamatti!

The versatile star was nominated for an Oscar for his performance in Cinderella Man, though we think he should have been nominated and crowned Best Actor for his role in Sideways.

Here's a look at a few of Giamatti's more recent roles:

• Fred Claus: Santa Claus
• Cinderella Man: Joe Gould
• Sideways: Miles