The movie was originally entitled “House Bunny” which was changed for some vague reasons that seem to involve another star of the movie Paris Hilton.

It was very noticeable at how Anna Faris has turned healthy and achieved tone, lean muscles. But after finishing the movie, she admits gaining a few pounds back and confesses how difficult it is for her to maintain her weight at such state and with her diet regimen.

In preparation for the movie, Anna Faris adhered to a strict diet and a workout routine. Amazingly, she managed to lose 10 pounds and even denies a double for some of her roles in the movie.
           
Faris started training with Nicole Stuart for Pilates sessions which she claims to be the most beneficial part of her weight loss program. She also runs three miles a day and adhered to a strict diet of eating only chicken along with steamed veggies. All the hard work and discipline actually paid off but Faris states that she does not intend to stay on the diet for long term.