The "Piranha 3D" star also said the recent London 2012 Olympics inspired her to take up more physical activity, reported Daily Star.
"He's an ex-rugby player and now he's training to be a sprinter. So I live with an athlete... Since the Olympics I have been working out a little bit, I think it's got everyone inspired," Brook said.
"He's got me sprinting. We go to the park and he'll be like, 'Run to me' and I'll get halfway and think, 'Oh, I'll just walk the rest of it', and the look on his face is like pure disgust that I've not finished," she added.
