Christopher Eugene O'Donnell is an American actor and former model. He played Charlie Sims 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 stars as special Agent G. Callen in NCIS: Los Angeles, a spin-off of NCIS.