The Monster's Ball star portrays a pregnant space traveller in Steven Spielberg's new TV drama, and she admitted her first experience of weightlessness left her feeling more than a little queasy.
She told 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, insisted she had no problem pulling off the role of a mum-to-be.
She said: "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!"