The 45-year-old actress recently had a naked scene in new movie The Proposal alongside Ryan Reynolds, 32, and she admitted it was getting into exercise at a young age that has kept her in shape.
She said: "I have to say, Helga Bullock – a very strict German woman – forced me into gymnastics and dance at a very young age.
"I hated her for it, then continued to do other athletics and now I am thankful for what she started because it’s something I can keep doing for the rest of my life."
She added: "Look, it’s like ebb and flow, I gain 20 pounds, I lose 20 pounds, I am a fat cow, I am too thin.
"As long as I’m healthy and I feel good, I’m happy and I am lucky that my mother instilled something early on that’s kind of still sticking together."
Source: Splash News