Sienna MillerSienna Miller has reportedly been given a new hairstyle by computer artists for her new film Hippie Hippie Shake - and we’re not talking about the hair on her head.

Sienna plays the hippy girlfriend of controversial publisher Richard Neville in the period piece and has to get naked on a number of occasions, and that’s where, according to the Mirror, problems occurred.

A source told the newspaper: “The film is set in the swinging ’60s when fashion was wild and body hair even wilder.

“Sienna was an absolute star throughout filming and her performance was flawless. The only slight problem being that she’s very much a girl of the Noughties - and this extends to her personal upkeep.

“Unfortunately, Brazilians weren’t common in the ’60s and Sienna’s part involved nude scenes - meaning that her grooming habits were on full display.

“A merkin or pubic wig simply wouldn’t have done the trick, but luckily computer wizardry came to the rescue. Sienna’s private parts were digitally enhanced, giving her a rather unruly, loud and proud bush.

“All the cast had a good giggle about it and stoical Sienna happily played along. But it’s safe to say this is one look she won’t be recreating on her next summer hols.”

The film, which also star her Edge of Love co-star Cillian Murphy, is released in the UK later this year.