Scarlett Johansson Calls Josh Hartnett "A Good Boy"

Scarlet Johansson has spoken out about her relationship with Josh Hartnett for the first time.

The Black Dahlia co-stars have kept their romance on the down low but Johansson says they couldn�t be happier.

She told Allure magazine: "Josh is very sweet. He's a good boy. A great person. I'm very lucky and I'm very happy."

However the Lost In Translation starlet says that she�s still worried by the publics perception of her.

�Contrary to popular belief, I'm not promiscuous," she said. "There does seem to be a mistaken belief out there that I am sexually available somehow � which is not to say that I'm not open-minded about sex.�