Czech Model Paulina Porizkova, 50, displays her Hot physique as she hits the beach in skimpy blue bikini

She first caught the eye as a sultry Sports Illustrated star at the age of 19, but while more than 30 years have passed since her breakthrough Paulina Porizkova proved she still has the ability to turn heads on Saturday afternoon.

The Czech born model, who celebrated her 50th birthday in April,displayed a youthful physique as she waded out of the ocean during a day at the beach in sunny St. Barts.

Sporting a skimpy blue two-piece, mother-of-two Paulina appeared to be in high spirits while padding across sand following a brief dip.

The model, who in 1990 and 1992 was chosen by People magazine as one of the world's Fifty Most Beautiful People, was also named by Harper's Bazaar as one of its ten most beautiful women that same year.

The Vogue cover model also proved that she had what it took to light up the dance floor with an appearance on Dancing With the Stars in 2007.

The model was joined by 15-year-old Oliver – the youngest of her two boys

The following year, Paulina was a more ubiquitous media presence as she became a judge on the hit CW series America's Next Top Model and saw her first book, the fiction novel A Model Summer, released in paperback.

She also revealed on Twitter in January that she had made progress on her upcoming book, noting: 'Starting to really work on my new book. 50 pages down. Good for a beginning.' 

Although she is happy to pose make-up free when she's not on shoots, Paulina has previously been candid about the use of retouching in beauty advertisements. 

The model, who appeared in a controversial ad for Avon's anti-aging, Anew range, told the New York Post earlier this year: 'You haven’t seen a picture in a magazine [that isn’t retouched] since at least Adobe Photoshop came out.' 

Paulina said that she does not know whether her Avon Anew campaign was airbrushed, but emphasized that a good photographer and lighting can be just as effective. 'Do I look better in some pictures than others? I'm sure,' she said. 

The supermodel, who later rose to fame after gracing the cover of Sports Illustrated in 1984 when she was just 19 years old, has always been exceptionally close with her mother, Anna, a former midwife.

In an interview from the early Eighties, Paulina described being re-united with Anna as a child, stating: 'I was six years old. I thought she looked like a movie star - she was so beautiful.'