American actress Sharon Stone impressed onlookers in a standout Dolce & Gabbana gown Thursday evening, while attending the Monte-Carlo Gala for Planetary Health.

The purple ensemble featured an elaborate train, and the Hollywood star, 63, completed the extravagant look with a black leather clutch bag and matching strappy heels.

Stone smiled for the cameras as she made her way into the charity auction alongside Prince Albert II of Monaco, 63, and Caroline, Princess of Hanover, 64.

Several notable celebrity guests were in attendance on the night, including British actor Orlando Bloom.

Not in attendance was Prince Albert’s wife Princess Charlene, who is still recovering from an ear, nose and throat infection that kept her from attending the exclusive event, as rumours swirl of a rift between the royal couple.

Stone posted two photos to her Instagram from the event, captioning them: ‘“Kindest regards to Prince Albert and @hshprincesscharlene/Planetary Health.”

Fans of Stone were clearly impressed by the star’s glamorous look, with one writing, “WOW! Absolutely stunning. You look amazing – incredible dress.”

Another added, “Love this colour on you!”

A third wrote, “Princess! QUEEN!”

It wasn’t the first time Stone has wowed onlookers with her style this year, having pulled out all the stops at the Met Gala earlier this month in a black cape-style dress with black sequins from American designer Thom Browne, which featured black sequins. Sharon coordinated the outfit with a simple pair of green dangling earrings and wore her blonde locks pushed back.