To prepare for the nude scenes, Friel said she is already dieting and exercising four times a week, the Daily Mail reported Tuesday.

"I pray I don't have a Caesarean so I can get into a workout regime quicker," she told Grazia magazine. "We've got a good rowing machine at home and we're lucky enough to live on the Long Walk in Windsor, so I'll run a lot.

Friel is to begin a follow-up film to the football film "Goal!" in October and has promised to have a bikini body by then.