Hayden Panettiere & Milo Ventimiglia Call It Quits

"Heroes" co-stars Hayden Panettiere, 19, and Milo Ventimiglia, 31, have indeed called it quits after two years of dating.

A source close to the couple told Us Weekly the reason behind the split was "a lifestyle conflict," noting that Hayden "likes to go out in the Hollywood scene and that's not his style."

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"They were in very different places," the source said. "They are still on friendly terms. There are no hard feelings."

The story comes on the heels of a story by Radar Online, who first reported the couple had called it quits.

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In fact, Radar spotted Hayden out at Crown Bar in Hollywood last week—and she wasn't alone. The online mag reported the "Heroes" hottie hooking up with singer Jesse McCartney, 21.

"[Hayden] was sitting on Jesse's lap while he kissed her neck. Then she got up and did some crazy sexy dance in his lap," Radar reported.

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