Marc Jacobs and his ex-boyfriend Lorenzo Martone show off their toned bodies

Marc Jacobs, the famed fashion designer, revealed the dramatic transformation he had made to his body as lost weight and toned up by eating only vegan food and training two hours a day, seven days a week.

Yesterday Marc Jacobs, 48, showed that he’s still keeping in great shape by flaunting his incredibly ripped beach body as he walked along the St. Barts beach with his equally muscular ex-fiance Lorenzo Martone.

Marc Jacobs and Lorenzo Martone each wore tiny swimming shorts, with Marc in a navy pair and Martone in a nautical red, white and blue stripe brief.

They also showed off their tattoos, including Marc Jacobs’ infamous playful M&M and Spongebob Squarepants inkings and Lorenzo Martone’s classic scripture.

After their stroll, the former couple who have appeared to have perhaps rekindled their love, retired to some sun lounges on the sand.

They draped them with matching monogrammed Louis Vuitton towels, neon with one of the label’s signature Stephen Sprouse graffiti design.

Marc Jacobs and Lorenzo Martone got a nice surprise when super-stylist Rachel Zoe dropped by to say hello with her gorgeous tot Skylar.

Lorenzo Martone particularly went gaga over the 8-month-old blue-eyed baby boy, who looked cute in a white all in one.

Rachel Zoe, 40,as always looked chic in brown and white printed maxi-dress which she paired with a black wide-brimmed hat.

She later soaked up some sun with the famous designer by laying down next to Marc on another lounge.

Later Marc Jacobs covered up in a pair of cool board-shorts, presumably from his own line, and a black singlet.

Lorenzo Martone playfully held up his arms as the pair indulged in some silly dance moves.

The pair’s appearance on the French island might be a sign that they are getting back together after splitting last year.

The engaged couple called it quits with Lorenzo Martone announcing the news via Twitter in July 2010.

“thanks for t notes. yes, I saw t press today,” Lorenzo Martone wrote.

“We are not together, haven’t been in 2 months. And we will not comment on it. Sorry. We r fine.”

Marc Jacobs and Lorenzo Martone got engaged at the beginning of March 2009.

Marc Jacobs attributed his incredible body transformation to an organic diet and grueling fitness regime.

In 2007, Marc Jacobs told NY Daily News: “I’m eating a totally organic diet, which has no flour, no sugar, no dairy and no caffeine, and I lost weight because of that diet and because of a two-hour exercise regimen seven days a week.”

The designer told the publication that he was aware that people would jump to conclusions about how he lost weight, especially in the fashion world.

“You’re going to get a bunch of blogs saying: <<He must be on meth in order to be that skinny compared to 10 months ago>>.”