isla fisherIsla Fisher has revealed she repeatedly annoyed her personal trainer on the set of new film Confessions of a Shopaholic because she refused to life by his rules.

She admitted recently: “He wanted to come round [to my house] every single day and I couldn’t have that.

“So I got it down to three times a week, but he was all about lifestyle. There was a list of things I couldn’t eat - it was so long, there was nothing left that I could eat! It was awful.

“I had to lead this double life where I was pretending I was being really good, when secretly I had cakes stuffed in my anorak pockets and I had to shove them into my mouth when he was turned the other way.

“One time, I’d eaten already french fries and a hamburger and had a really awful day. I confessed that I’d eaten one bread roll - I lied about everything else - and he almost cried.

“And I thought, ‘Oh no, imagine if he had any idea what I was actually getting up to behind his back!’”

Isla began filming the rom-com four months after giving birth to daughter Olive.