Kelly Brook is one of the sexiest women on the planet but she insists she was a GEEK as a youngster and embarrassed by the effect her curves had on people.

‘I was geeky when I was growing up,’ she says. ‘My mum used to call me Saffy from Ab Fab – even now, if I tell her off for smoking, she’s like, "Alright, Saffy, calm down!"

‘I was 11 when I developed curves,' she recalls. 'I was unaware people might look at me in a sexual way. We had a fire alarm at school one day, I got caught talking in the line and the Head Of Year made me stand in front of the whole school. A group of boys I’d been friends with for years laughed at me for getting told off, and I was like, ‘Oh be quiet!’

‘The Head Of Year sent me to her office and said, ‘You can’t come to school looking the way you do, flirting with every boy that comes past.’ I was 11! I didn’t know what the word ‘flirt’ even meant. I dressed the same as everyone else, but my curves made me different. After that realisation I felt very uncomfortable with my looks.’

Kelly as a 'geeky' schoolgirl

Even when she started modelling, Kelly didn’t find it easy to embrace her sex appeal. ‘I found glamour modelling embarrassing to begin with, but that was part of my success,’ she says. ‘I had the body of a porn star and this innocent, dumb-looking face.’

Can't get enough of Kelly? Here's what she told us about herself...

Stage school was the making of her

'The thing that changed the course of my life was moving to a performing arts school aged 12. I became better at dealing with attention. It forced me to come out of myself. It was the best thing I ever did.'

She believes you can be a glamour model AND a feminist

'Feminism is about being who you want to be and having choices. If that choice is to be a glamour model, that’s empowering because it’s your decision. That’s the whole point of feminism.'

Being beautiful has held her back in some ways

'Modelling opened so many doors for me, but it closed a lot too. We grow up thinking beautiful women can’t be anything apart from beautiful, which is sad. As soon as I start trying to be other things or learn new skills, people are like, ‘No, you can’t do that!’ I think,

‘I might not be able to do it well, but I’m going to give it a go, and hopefully one day I’ll succeed.’ Looks fade and it’s nice to have other talents. I’m still working on that one. My looks are fading and I’m yet to have skills or talents, but I’m trying!

Kelly with her boyfriend Jeremy Parisi

Being so curvy has its problems

'My boobs have been a blessing and a curse. My body wasn’t fashionable in the 90s, that’s why I worked so much with lads’ mags. They embraced my curves, whereas the fashion mags were like, ‘Oh no, strap them down!’ Men celebrate curves. Women should do that more, I think.'

She says she’s 'let herself go a bit' lately

I blame my boyfriend Jeremy – I was eating the same as him, but he’d go for a run and I’d sit on the sofa. I’d gone up to a size 16 and I felt it was too big for my frame. My boobs had got so big it was hurting my back.

She feels constant pressure to look good

'In this industry people are looking at me and I want to look the best I can be. I’ll be 40 in November and it’d be great to hit that milestone in the same size 10-12 jeans I wore when I was 21. I think I can do it.'

She’s awful at crash dieting

'In the past I’ve done quick fixes, deprived myself, then put back on more than I’d lost. In October I started using S limFast’s new Advanced Vitality drink and it’s worked because it’s fitted into my lifestyle. I’d have my drink before each meal and it’d fill me up, so I didn’t fancy eating as much as I did before. I can still have naughty things in moderation, but now I only want a biscuit or two, not the whole packet. I’ve got much more energy and I’ve lost 15lb. I can wear my nice underwear again instead of huge frumpy bras, and I’ve stopped tweaking my Instagram images because I looked fat.'

Kelly shows off her slimmed down figure

She’s been too thin as well before

'I’ve been too skinny in the past, and that was worse than being big. My face looked gaunt. It was down to anxiety and being in bad relationships with men who weren’t very nice to me. I don’t want to ever look like that again.'

She met her boyfriend on social media

'I met Jeremy on Instagram, which feels very modern. I didn’t follow him to chat him up, it wasn’t like I sent him a naughty selfie! I followed him because he was a martial artist and I was studying it and wanted his advice. It was more of a professional thing. Even though I did fancy him as well…'

Losing her dad is the worst thing she’s ever faced

'Of course losing your parents is the natural order of things, but it is so hard. I miss his sense of humour, he made me laugh all the time and he was so much fun to be around. I have so many amazing memories, I miss him every day.'

She’s older and wiser now

'I’ve learned life’s too short not to be happy. If I’m not happy in a relationship or a job, I just won’t do it. I won’t be unhappy for the sake of a pay cheque or not being lonely. I’ve developed the confidence to turn things down, and believe nice things and nice people will come to me.'

Kelly Brook is celebrity weight loss ambassador for SlimFast Advanced Vitality 4 in 1 Action, a new range of weight loss sachets and capsules formulated to help you feel less hungry. Follow @SlimFastUK