New Delhi, July 27 : Actress Jessica Biel has revealed that she works out five hours a day to maintain her svelte figure.

She said: "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!"

The `London' star added that she maintains a balanced diet apart from the gruelling exercise sessions, the China Daily reports.

She explained: "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.

"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.

However, it does not stop her from having what she wants.

She said: "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."

Biel is currently dating singer Justin Timberlake. (ANI)