According to Ok! Hayden Panettiere is playing dirty on the set of Heroes and is trying to get her ex Milo Ventimiglia kicked off the set.

“She refuses to be on the set at the same time as him,” the pal tells OK!. “She is making it difficult for everyone involved.”

As for Milo, “He’s not going to play any games or stoop to her level,” says the friend.

Her rep is denying denies this, but she has been known to behave like a diva