Shannon Costello: Sean Penn’s New Girlfriend!

Sean Penn goes public with girlfriend Shannon Costello on Friday (August 19) at Nobu in Malibu, Calif.

The 51-year-old actor and Shannon, 26, met in fall 2009 and first became friends, according to People.

Shannon is also the former communications director for Sean‘s J/P Haitian Relief Organization and has worked on the documentary Waiting for Superman and ABC News’ 20/20.

Sean will next hit the big screen in the drama, This Must Be the Place, while Shannon will be a producer for Ron Howard‘s new film, Under the Banner of Heaven.

10+ pictures inside of Sean Penn and Shannon Costello in Malibu…

Photos: AKM

Posted To: