Ryan Patrick Devlin (born June 5, 1980) is an American actor. He is perhaps best known for his role opposite Calista Flockhart on the ABC show Brothers & Sisters where he played her younger boyfriend Seth. In addition, he recurs in the role of Smith on the ABC-TV comedy Cougar Town. Devlin reprised his role as husband to guest star Mandy Moore's character, Mary, in season 7 of Grey's Anatomy.