By Hannah Southwick. A post shared by Diane von Furstenberg therealdvf. On Sunday, the legendary fashion designer, 74, posted a mirror selfie in an olive-colored one-piece after going for a swim in the ocean. Love to everyone. DVF has advocated for female empowerment throughout her career, and previously shared her dating and life advice for women with Page Six. The fashion legend joins the many celebrities over 50 still rocking swimsuits , including fellow fashion designer Vera Wang, 71, who went viral for her rock-hard abs last year.