OK magazine is reporting that not all is well on the set of Heroes. Since Hayden Panettiere and Milo Ventimiglia broke up, Hayden has apparently been making things on the hit TV show a living Hell in her efforts to get Milo fired from the show.

A source says that, “She is making it difficult for everyone involved… She refuses to be on the set at the same time as him.”

Milo, 31 has apparently decided to be mature about the break up and Hayden’s on set antics. Friends of the actor say “He’s not going to play any games or stoop to her level.”

But really, what did you expect Milo? You get teen age behaviour when you date teen agers.