Apr 9, 2009, 4:00 GMT
Halle Berry says celebrities who claim to stay slim without exercising are liars.
The 42-year-old actress - who has a one-year-old daughter, Nahla, with her partner Gabriel Aubrey - has to work hard to maintain her impressive physique, and insists it is the same for most women.
She said: "God bless them if they're telling the truth. It's questionable if they are. I always had to diet. I'm diabetic, so it's a lifestyle for me anyway just to stay healthy and not end up in the hospital."
Halle had to change her diet and exercise regime after giving birth to ensure she didn't pile on the pounds.
She revealed to Harper's Bazaar magazine: "Having a baby takes so much from you. It's the most glorious thing you'll ever do, but the aftermath is not so glorious! So now I'm having to exercise, eat a little bit differently, take a lot more vitamins.
"I used to work a lot because I had nothing better to do. What I've learned, especially by having a baby, is that you can't bring that stuff home anymore."
Halle recently announced she is to star in new movie 'Nappily Ever After'.
In the film, she plays a woman who splits from her long-term boyfriend when he doesn't propose, then becomes jealous when he moves on with his life.
Halle admits she is apprehensive about shooting the project because her role requires a drastic image change.
She explained: "I have to shave my head on camera. I'm scared to death. I just hope my reaction fits into the story. If it's uncontrollable screaming, it might be a different type of movie."
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