EXCLUSIVE: Stephanie Pratt goes topless for racy magazine shoot... and reveals plans for EXPLOSIVE book detailing her 'descent into drugs, rehab and arrests'

PUBLISHED: 00:02, 31 March 2015 | UPDATED: 07:38, 31 March 2015

Posing topless for the cover of FHM, it hard to believe Stephanie Pratt ever suffered from a lack of self-confidence.

But the 28-year-old beauty - who has stripped off for a sizzling shoot for the magazine's latest issue - has admitted she was a tomboy when she was growing up.

Stephanie said: 'Growing up, I was always a tomboy and I didn't have a lot of self-confidence. This is the ultimate sexy magazine, so it's really cool.'

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Racy: Stephanie Pratt has posed for a racy new photoshoot for FHM magazine, where she leaves very little to the imagination

Wearing nothing but a pair of black nylons on the cover of the men's magazine, with her arms barely protecting her modesty, Stephanie smoulders for the camera.

With her long blonde hair loose around her shoulders, it's not hard to see why she caused a stir among the male cast when she joined Made In Chelsea in 2013.

Another picture shows her wearing just an open blazer and white panties while a third image has the reality TV star flashing her pert derriere as she lies on a bed.

Stephanie, who is currently dating her MIC co-star Josh Shepherd, also revealed she is planning to write an explosive tell-all book, which will detail her dramatic life.

The former Hills star said: 'It's coming out later in the year, and it's about me growing up.

'It's got stuff about family, getting everything I've ever wished for, my descent into drugs and rehab and arrests.'

Daring: Wearing nothing but a pair of black nylons on the cover of the men's magazine, with her arms barely protecting her modesty, Stephanie smoulders for the camera

And Stephanie - whose brother is notorious bad boy Spencer Pratt - said she is also planning to open up about her sibling and her previous relationships.

She said: 'Then stuff about The Hills, Big Brother, Made In Chelsea, my brother, guys… I've been very honest.'

In the interview with FHM, LA native Stephanie was asked the difference between US posh girls and well-to-do Brits.

She said: 'Girls here are way more reserved. Like, they still get totally wild, but they can keep it classy while they're doing it whereas in the States, you'll catch us falling out of clubs barefoot.'

Blonde bombshell: Another image from the sexy shoot shows Stephanie flashing her pert bottom as she lies on a bed

Describing a super-posh night out in the States, she went on: 'It always starts with a dinner: the most exclusive restaurant you can get into, of course. And then it's the hottest club with a table in the VIP section and then car service – a huge SUV or sports car to whisk you home.

'The goal is to never wait for anything – a drink, entry to the club, your table, anything. In LA, the amount of time you have to wait for anything pretty much determines how important you are.'

For more pictures of Stephanie visit FHM.com. The full interview is on sale on Thursday.

Steph Pratt and Lucy Watson's Turkey snaps from last October