Isla Fisher wears Spanx

Isla Fisher wears Spanx.

The ‘Confessions of a Shopaholic’ star began wearing the stomach-smoothing undergarments in a bid to regain her slim figure after giving birth to daughter Olive – her first child with fiancé Sacha Baron Cohen – in October 2007 and admits she is amazed by the way they have transformed her shape.

She said: “I swear my waist now is skinnier than it was when I was pregnant – how do they do that?”

The actress admits she is relieved she managed to shed her post-pregnancy pounds so quickly because she is so bad at exercising.

She added: “Jerry Bruckheimer, the ‘Confessions…’ producer, hired a personal trainer to help me get rid of the 60lb I put on during pregnancy. He said I was lucky I was blessed with good genes because I had a really bad attitude towards exercise – like stopping when it hurt or got boring and having a cup of tea and a slice of cake. Apparently you are not supposed to do that in Hollywood.”