Rosie Huntington-Whiteley has been discussing her sideline as a fashion designer in an interview with Harper's Bazaar.

The supermodel graces the cover of the fashion mag's September issue - as well as being the subject of a 12-page spread inside.

And the serious-minded 27-year-old has declared that she'd rather spend her time designing threads for "real women" than "falling out of a nightclub with my knickers around my ankles".

Huntington-Whiteley is photographed by David Slijper in statement design pieces from Donna Karan, Stella McCartney, Gucci, Saint Laurent by Hedi Slimane and Chanel.

But she insists that she wants her own Rosie range for Marks & Spencer to be accessible to everyone.

"I was really conscious that I didn't want to put out a product where women would think, 'Oh, she's made something that only a twenty-something model can wear.'

"That's no fun to me. I love women and I wanted to make something for all women. Real women.

"Women actually come up to me and show me their bras. I get tweets and texts, and people will Instagram what they're wearing, and it's women of all different shapes and sizes and ages, and that makes me very proud."

She also insisted that she's not ashamed of being ambitious, saying: "It's funny, because I've done several interviews where people have written about my ambition like it's a bad thing.

"I've been lucky, I've been given some incredible opportunities but you also have to be focused. You don't get far without goals, drive, commitment, sacrifice."

However she admitted that living in Los Angeles does leave her homesick from time to time.

"I do battle with wanting to be closer to my family, wanting to call my brother on a Sunday and ask him to come round and watch The X Factor, or be there to support my sister, or go shopping with my mum.

"Not being able to do that can get me down. But I feel really grateful that I do get to be here once a month."

But she said her actor BF Jason Statham helps keep her grounded.

"That's what makes being with an Englishman out there so great. I mean, we live in Hollywood, for f**k's sake. It would be easy to lose touch with reality."

The full interview appears in the September issue of Harper's Bazaar, on sale 5 August and also available as a digital edition.

Photography by David Slijper, courtesy of Harper's Bazaar.