Robert Earl Buckley (born May 2, 1981) is an American actor, known for his roles as Kirby Atwood on NBC's comedy-drama series Lipstick Jungle and Clay Evans on The CW's teen drama series One Tree Hill. Buckley also starred as Brian Leonard on ABC's horror drama series 666 Park Avenue, and currently portrays Major Lilywhite on The CW's comedy-drama series iZombie.