Knocked Up Sigma Nu

Frat Guy of the Week: Paul Rudd

"Knocked Up" and 40-Year Old Virgin co-star Paul Rudd was a brother of Sigma Nu while he attended the University of Kansas.

Rudd, 38, was born in Passaic, New Jersey. His father was a tour guide and his mother was the manager of a TV station.

Since then, Rudd has starred in Clueless, Wet Hot American Summer, The Cider House Rules, Anchorman and The Object of My Affection. He also had a role in the TV series Friends.