Hayden Panettiere is so into her new man that she didn’t notice when a drunken stranger urinated on her at a party in Los Angeles last week.

We hear the Heroes beauty, who recently split from longtime BF, co-star Milo Ventimiglia, couldn’t take her eyes off her mystery date, known only as “Vladimir.” Onlookers at the event for ex-Teen Vogue editor Carlos Lopez’s birthday say Hayden, 19, and Vladimir were passionately kissing when a man began urinating next to them.

“Hayden was so oblivious. The crowd around the fireplace scattered, but she and the hunky guy just stood there, holding each other and kissing. She was so close, Hayden must’ve gotten some pee on her shoes!” a spywitness quipped to the New York Daily News on Monday.

“She had this grizzly bear-looking man with her. His name was Vladimir and everyone kept talking about how he was a wrestler,” the insider added.

“He was huge though, especially in comparison to how small she is. He looked like he could’ve eaten Hayden as a small snack.”