Josh Hartnett seems to be enjoying the bachelor lifestyle after he was spotted at a night out in London.

Looking serious in nerdy glasses, the single star arrived at Bungalo 8 alone but was accompanied by a mystery blonde at the end of the night.

The handsome actor has been linked to a string of beautiful women since his split from actress Scarlett Johansson, including Penelope Cruz and Girls Aloud's Nadine Coyle.

Josh is in London to play Charlie Babbitt at the Apollo Theatre's production of Rain Man.