Burke and Hare actress Isla Fisher revealed she only pretended to squeeze into a corset for the period comedy because she was three months pregnant during filming.

The 34-year-old actress – who gave birth to her second child with husband Sacha Baron Cohen this summer – plays actress Ginny in the black comedy directed by Blues Brothers’ John Landis.

Her character is the love interest to Simon Pegg, who stars opposite Andy Serkis in the film as infamous grave robbers Burke and Hare.

At the film’s premiere at the Curzon Chelsea in London, she said: “That was difficult because I was pregnant during the making of the movie, so I didn’t really squeeze into it. 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.”

The Australian actress – who also has a three-year-old daughter Olive – revealed that Pegg did not notice she was pregnant while they were working together, even though she was suffering from terrible morning sickness.

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