Donovan played Jimmy Cooper, whose embezzlement caused his marriage to Julie (Melinda Clarke) to crash and burn in The O.C.'s first season. Dad to Marissa (MischaBarton) and Kaitlin (WillaHolland), he later dated Hailey Nichol (Amanda Righetti) and began sleeping with his ex-wife, who had gotten remarried. Jimmy -- who eventually found himself in more financial trouble -- once again proposed to Julie, who accepted. They later called their engagement off and Jimmy left Newport for good.