Milo Hayden

Hayden Panettiere and Milo Ventimiglia, two people with the most difficult to remember last names in Hollywood, have split. Sources say it was a “lifestyle conflict,” making out with another guy usually is, and that they are in “very different places.”

The source tells Us that Panettiere, 19, “is young. She likes to go out in the Hollywood scene and that’s not his style.”

Ventimiglia, 31, “has been concentrating on work on his production company [Divide Pictures],” the source adds.

May-December romances rarely work. For one thing, they’re never old enough to get into clubs and for another, they always have to be home by ten to finish their algebra assignment.