Who are you calling grandma?

(left to right) Actress Sharon Stone, actress Jane Seymour and supermodel Christie Brinkley.

Save for a few faint wrinkles, these celebrities are putting women half their age to shame with their sexy images.

So what is the secret behind their seemingly everlasting youth?

CHRISTIE BRINKLEY, 60

Last week, the blonde US model showed off her eye-popping figure - gravity-defying breasts, toned legs and flat tummy - in an orange Victoria Beckham bodycon dress at a party celebrating the 50th anniversary of the Sports Illustrated Swimsuit Issue in New York.

Brinkley rose to fame after appearing on Sports Illustrated cover for three consecutive years and being cosmetics giant CoverGirl's face for 25 years.

The self-proclaimed bikini-shy mother-of-three wore a blue swimsuit for the cover of People magazine. She also sauntered in a two-piece for Air New Zealand's in-flight safety video.

Senior editor of Sports Illustrated's Swimsuit Issue MJ Day gushed to People magazine: "She looks phenomenal. She has the legs of a 30-year-old and the face of an angel.

"She's what you aspire to look like at 60. She's mind-blowingly beautiful."

Her secret

- Exfoliating daily

- Hair extensions

- Total Gym (home gym exercise equipment)

- Spinning, running, weight-lifting and yoga. Leg lifts while brushing her teeth

- A mostly-vegan diet of three meals daily, snacking on melon and walnuts

- Visits the dermatologist once a month for "special facials"

- "Never say never" to plastic surgery, which she has neither confirmed nor denied doing

She says

"I don't believe in allowing my age to define me. And I really believe attitude plays a huge part in how you feel.

"The word 'involved' has a lot to do with feeling young. It would be remiss of me to not say that one of the best is to care about the world around you when talking about beauty secrets."

JANE SEYMOUR, 63

The former Bond girl and mother-of-four flaunted her toned bikini bod for the cover of US magazine Closer Weekly's January issue.

She has admitted to - and regretted - plastic surgery in the past, but these days, she lets nature take its course, does her own make- up and eschews facials.

Her secret

- Eating organic food and whatever she plants in her garden

- Spinning, pilates, gyrotonics and light weight training three days a week

- Wear a hat while out in the sun, drink lots of water and get plenty of sleep

- Botox injections, breast implants and eye-lift in the past

She says

- "I'm in better shape now in some ways than I was when I was doing the Bond film (1973's Live And Let Die). I don't do major fasts or work out crazily every day. I hope I can inspire people!"

SHARON STONE, 55

The US actress and mother-of-three appeared on the cover of Shape magazine's March issue looking toned in a yellow bikini under a mesh cover-up.

Although she has resisted many surgeons' attempts to give her a face-lift, she admitted to grappling with the ageing process.

Stone, who suffered from depression in her 20s after a 20kg weight gain, told Shape: "There was a point in my 40s where I went into the bathroom with a bottle of wine, locked the door and said, 'I'm not coming out until I can totally accept the way I look right now'.

"And I examined my face in the magnifying mirror, looked at my body and I cried. Then I told myself, 'You're going to get old now. How do you want to do that?'"

Her secret

- Avoid alcohol and processed food

- High-protein diet heavy on steak, fish and cheese

- Strength-training, stretching, dancing and yoga

She says

"This idea that being youthful is the only thing that's beautiful or attractive simply isn't true.

"I don't want to be an 'ageless beauty'. I want to be a woman who is the best I can be at my age."

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