Helen Mirren thinks her bum looks big in military uniform

Los Angeles - Dame Helen Mirren has moaned her bum looks big in her new movie Eye in the Sky.

The 70-year-old actress had to wear military uniform for her role as Colonel Katherine Powell in the drama which focuses on the ethical and moral implications of modern drone warfare.

Mirren admits it wasn't her favourite costume and she was stressed about what her derrière looked like on the big screen.

During an interview on UK TV show This Morning, she said: "I was like, 'Does my bum look big in this? Yes it does!'"

Although Mirren didn't love the clothes she had to don, she was blown away by the attention to detail and the neatness of military uniform.

She added: "The fascinating thing I learnt from the military advisor is that they are obsessed with the detail in a camouflage outfit, like exactly which button is done up, where your hat is, exactly where your belt is, exactly how many rolls of your sleeve you roll up, exactly how your trousers are tucked, they are obsessed with detail. It's extraordinary."

Watch the full interview here: