Their romance has been surprising from the moment they first went public, but Mary-Kate Olsen and Olivier Sarkozy may have pulled off the ultimate shocking moment in their relationship and secretly married!

Surprising Celebrity Couples--Including Mary-Kate Olsen & Olivier Sarkozy

The 28-year-old actress-turned-designer was spotted in the Hamptons with her 45-year-old French banker fiancé September 24, and though the two were enjoying a simple lunch together on a park bench, it was the matching gold rings they each wore on their left hands that garnered more attention.

The two appeared to be sporting gold wedding bands on their left ring fingers, with the 28-year-old famous twin's impressive Cartier engagement ring moved to her right hand.

And though Olsen has been wearing a ring on her finger since revealing she was engaged to the financier in March, Sarkozy has never been seen wearing a band on his finger, not even as recently as when he and Olsen were spotted out in New York City on August 14.

The couple has been one of the more shocking pairings since going public, with many criticizing them for their 17 year age difference, though it has never stopped them from showcasing PDA while out together in public.

Even as recently as their August appearance in the Hamptons, the couple showcased playful amounts of PDA.

"Olivier was very, very publicly affectionate with Mary-Kate-very playful," a partygoer at the Breast Cancer Research Foundation's third annual Paddle & Party for Pink benefit in North Haven August 16 told People. "They were kissing [and] touching. They just seemed happy to be together in this beautiful environment."

There has been no confirmation on the rumors the two have married.

Tags: mary-kate olsen Olivier Sarkozy