The "Heroes" actress - who plays self-healing cheerleader Claire Bennett in the hit TV show - donned a special raunchy cheerleader outfit and treated her co-star, who turned 31, by gyrating in front of him, before whipping off the costume to reveal sexy red lingerie.

A source said: "Hayden gave Milo an unforgettable birthday surprise by morphing from her bouncy cheerleader character in 'Heroes' to a bump-and-grind striptease.

Hayden Panettiere is delighted to have moved into her new house.

The 'Heroes' actress, who has spent months decorating the property, is still waiting for her best friend to move in so she can throw a housewarming party.