Actress Halle Berry threw up after trying out a zero-gravity flight as she prepared to play an astronaut in new sci-fi series Extant.

The Monster's Ball star portrays a pregnant space traveller in Steven Spielberg's new Tv drama, and she admits her first experience of weightlessness left her feeling more than a little queasy.

She tells Us Weekly magazine, "I took a zero-gravity flight. An hour and a half of plummeting up and down - I vomited at the end."

But Berry, who has two kids, insists she had no problem pulling off the role of a mum-to-be.

She says, "I know how to act pregnant, so I thought, 'I'm going to ace that part of this for sure'. And I love being pregnant - that's the happiest I've been in my life!"