Isla Fisher hid pregnancy during film shoot

London: Isla Fisher fooled all her co-stars on the set of new movie `Burke and Hare` as she successfully hid her pregnancy from them throughout the entire shoot.

The `Confessions of a Shopaholic` star and her husband Sacha Baron Cohen refused to confirm the actress was expecting her second child and reports about the birth only surfaced when they were spotted pushing a baby buggy around London in September.

The 34-year-old actress has now admitted she kept the news quiet during the filming of the movie with Simon Pegg and Andy Serkis, who play the infamous British grave robbers, and spent weeks hiding her morning sickness and her expanding belly, reported Contactmusic.

She wasn`t able to wear a tight corset for the period costume in her condition, but none of her colleagues noticed.

"That was difficult because I was pregnant during the making of the movie, so I didn`t really squeeze into it (the corset). I used to pretend I was wearing a corset and then not wear it, just wear a push up bra - don`t tell the director that," said Fisher.

Pegg confirms he had no idea his co-star was pregnant until he saw her sporting a full baby bump months after the shoot wrapped.

"I didn`t know what was going on. She didn`t look pregnant until the last minute. I saw her a couple of months later and she was like a balloon. None of us knew, not even John knew. She hid it well," said Pegg.

Fisher has a daughter, Olive, with Cohen, but they have yet to reveal the gender and the name of their new baby.