Um, not so much...

Childish? Yes.

As we told you Monday, Hayden Panettiere (aka the actress who has the most impossible name to spell) is a real snatch. She not only barks at reporters, she's now trying to get her ex and co-star Milo Ventimiglia kicked off Heros.

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

Of course, her rep denies all of this, but I have a feeling it's totally 100 percent true. Underneath all that blonde hair, that ear-to-ear smile, and those bright innocent looking eyes, lies a raging, sharp-toothed monster. I have no doubt.

P.S. Hayden likes her men old, old, old. Since the split with Ventimiglia (yet another ridicuolously hard name to spell) she's dated rocker Anthony Kiedis (46), Laguna Beach alum Stephen Colletti (23 - alright, not so old) and uber hottie Gerard Butler (39).

Dang, lady!

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