Washington, July 25 : Jessica Biel has revealed the secret to her hourglass figure-gruelling exercise and small meals.

`The Illusionist' star, who is dating ''SexyBack'' singer Justin Timberlake, works out five hours a day to maintain her svelte figure because she feels under pressure to look good for movie roles.

"I''ve worked out five hours, sometimes more, in a single day, if I''m in training for a film role or something. And it''s hard - it''s very hard!" Contactmusic quoted her as saying.

But, despite her gruelling exercise schedule, the 27-year-old beauty has to make sacrifices with food too and often only eats controlled meal portions.

"You have to find a balance, especially with what you eat. I don''t live by the idea that you can''t allow yourself a treat," Contactmusic quoted her as saying.

"I say, ''Eat things you like, but eat them in smaller portions.'' I always cut things in half and send half back. I''m not perfect, I don''t always do those things, but that''s the goal.

"Do I eat dessert? You know, if there''s something I want to try then I try it. But I have a bite, not the whole thing. That''s what you have to do," she added. (ANI)