Christopher Eugene "Chris" O'Donnell (born June 26, 1970) is an American actor. He played Robin in two Batman films, Batman Forever and Batman & Robin, Charlie Simms in Scent of a Woman, Finn Dandridge in Grey's Anatomy, Peter Garrett in Vertical Limit, and more recently, Jack McAuliffe in The Company. O'Donnell currently stars as NCIS Special Agent G. Callen on the CBS crime drama television series NCIS: Los Angeles.