Hayden Panettiere is back on the market.

Us Weekly has learned the Heroes hottie, 18, and her boyfriend of one year, Laguna Beach alum Stephen Colletti, 21, have gone their separate ways.

But the actress (who spent the end of August promoting Heroes in Europe with costars Milo Ventimiglia and Adrian Pasdar) seems to have moved on. When Us asked, “Where’s Stephen?” at the MTV Video Music Awards on September 9, she furrowed her brow and replied, “I don’t know. In California?”

Maybe it’s because she had time to adjust to the relationship being over. As a source tells Us, “Their breakup has been a long time coming.” But that doesn’t mean the former sweethearts are feuding. Panettiere tells Us, “We are still very close friends and talk to each other frequently. We appreciate and support each other’s careers.”
(Colletti’s rep could not be reached for comment.)

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