'Lipstick Jungle' star Robert Buckley has joined the cast of 'One Tree Hill'.
Reuters reports that Buckley will play Clayton, a sports agent whose close friend and client is Nathan Scott (James Lafferty).
'Beverly Hills, 90210' star Brian Austin Green had been in talks about the role at one stage.
Buckley played Kirby Atwood in 'Lipstick Jungle'.
