It's the case of the divalicious actor! A friend of John Cates, who played Rusty for a few eppies of One Tree Hill in season three, says that while Chad Michael Murray plays a sweetie on the show, that's far from the case in real life. In fact, while it's said that he cheated on ex-wife and current co-star, Sophia Bush, the source tells Page Six he's a "jealous diva" toward other male actors who plays her love interest on the show!

"Chad told producers, 'It's no more John Cates or no more Chad Michael Murray,' because he thought John and Sophia were flirting," the pal says. Echoes another insider, "Chad was a terror to work with. Writers kept plotting him and John against each other, and Chad took it seriously. He told everyone on set he couldn't stand John, and finally producers wrote him off the show." Burn!

Hmmm...maybe we should ask Stephen Colletti what he thinks!