Milo Ventimiglia & Hayden Panettiere Split

Heroes costars Milo Ventimiglia and Hayden Panettiere pulled the plug on their relationship last week, JustJared.com has confirmed.

Milo isn’t about drama and wants to focus on work and his upcoming projects JJ has learned of his production company Divide Pictures.

A source tells Us Weekly, “It was a lifestyle conflict. They were in very different places. [Hayden] likes to go out in the Hollywood scene and that’s not his style. They are still on friendly terms. There are no hard feelings.”

Hayden, 19, and Milo, 31, started dating in late 2007.