Scarlett Johansson put her title as one of the world’s sexiest women at risk on Saturday when she appeared as an ugly, balding alien living in a comedienne’s stomach on US TV.

The actress was hosting satirical show Saturday Night Live when she dressed down to play a ‘quatto’ who had taken over cast regular Maya Rudolph’s stomach in one sketch.

She ended the hilarious skit by tongue kissing a fellow quatto, played by comedian Andy Samberg, while human guests at a party threw up.

Johansson further showed off her comedy skills on the show by playing Donald Trump’s socialite daughter Ivanka, a bratty socialite on the hunt for a trampy prom dress and the daughter of a New York marble column salesman.