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.

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.