The "Euphoria" star rode a Sea-Doo with the muscular guy, who has yet to be identified, on Friday, in photos obtained by Page Six.

Amid the bevy of snapshots were images of Sydney Sweeney wearing a navy bathing suit while jet-skiing. The pictures also feature an unidentified, brown-haired man, and he was riding the jet ski with Sweeney.

Sydney Sweeney is living her best summer life, and the world wide web is loving it. The Euphori a star was recently spotted enjoying a lazy lake day in Idaho but it wasn't so much the hot weather or her sassy swimwear that had everyone talking. It was, however, the company of a brooding, handsome new face: a mystery man whose name is not known.