Actress Pamela Anderson surprised Playboy entrepreneur Hugh Hefner on his 82nd birthday with a naked lapdance.

The star - who has appeared on the cover of the publication 12 times - gave the media mogul the unique gift during celebrations at the Palms Fantasy Towers in Las Vegas on Saturday.

As Hefner walked into his luxury suite, Anderson, 40, emerged from a bedroom in nothing but high heels and proceeded to perform a the seductive routine for him.

George Maloof, who owns the hotel, says, "He was stunned and had the biggest smile I've ever seen.