Credit: John Shearer/

Even petite Isla Fisher sometimes struggles with her weight.

The star of the new animated flick Rango told that she can't tuck into food like she used to. "I don't know. I'm just trying my best," said the mother of two and wife of comedian Sacha Baron Cohen. Daughter Olive is 3, and Fisher just gave birth to her second daughter -- whose name has not yet been released -- 6 months ago.

Getting rid of the baby weight has been tough work. "I used to say that I could eat anything I wanted and it was true and now I can tell you that I can't eat whatever I want."

Fisher, 35, radiated beauty at the Rango premiere, a film where she shared animated scenes with Johnny Depp.

As for her work with Depp, well, that was a piece of cake. "He's so funny and I was so lucky and blessed to work with him and he's such a brilliant actor," she said.

A notoriously private couple, Fisher and Cohen were married in a top secret ceremony in Paris in March 2010.