Tate Buckley Donovan (born September 25, 1963) is an American actor and director. He is known for his role in the FX drama Damages, as Tom Shayes, and for his role as Jimmy Cooper in the American teen drama television series The O.C.. He voiced the title character Hercules in Disney's thirty-fifth animated feature film, in the animated television series and in the video games Kingdom Hearts II and Kingdom Hearts Re:Coded. He has also had supporting roles in films such as Good Night, and Good Luck and Argo. He starred as Brian Sanders on the CBS drama Hostages. His most recent television role was that of White House Chief of Staff Mark Boudreau on the Fox limited event television series 24: Live Another Day.