Ashley Madekwe

When I first started working on 'Secret Diary,' I definitely felt like I needed to shape up. The idea of being in my knickers on TV was a great incentive! Now I try to eat right, and I go to Bikram yoga three or four times a week. I have my 'naughty' days, and I indulge in pizza and cake, but so what!

A lot of people give actors credit when they gain weight for a role in a drama when they win an Oscar, but when you're doing a sitcom, people don't give you a lot of credit, because you've got to keep your weight on for five or six years if it's successful.