Christopher Eugene O'Donnell (born June 26, 1970) is an American actor and former model. He played Charlie Simms in Scent of a Woman, Chris Reece in School Ties, D'Artagnan in The Three Musketeers, Jack Foley in the drama film Circle of Friends, Dick Grayson/Robin in Batman Forever and Batman & Robin, Jason Brown in Robert Altman's Cookie's Fortune, Peter Garrett in Vertical Limit, and Wardell Pomeroy in Kinsey. O'Donnell currently stars as special Agent G. Callen on the CBS crime drama television series NCIS: Los Angeles, a spin-off of NCIS.