Celebrity Hilary Duff Shows Off Her Fierce Physique in a Bikini on Vacation By Rita Kokshanian Rita Kokshanian Rita Kokshanian is a Los Angeles-based writer and editor who covers celebrity, fashion, beauty, and lifestyle. She was previously an Assistant Editor for InStyle and is currently the Senior Copywriter at The Grind. InStyle's editorial guidelines Updated on February 5, 2016 @ 11:15AM Pin Share Tweet Email Photo: Chaos/STEWY/FAMEFLYNET PICTURES Hilary Duff may be mother to almost 4-year-old son Luca Comrie, but you wouldn't be able to tell by looking at her. The Younger actress is currently vacationing in Hawaii, where she was spotted wearing a colorful Solid & Striped bikini ($175, net-a-porter.com) on the beach. And spoiler alert: She totally rocked it. Duff is enjoying some time off with her ex-husband, Mike Comrie, and their adorable son. Despite the fact that the couple officially finalized their divorce last week, they seemed happy as ever to be spending time together in the tropical climate. Just last week, the lilac-haired actress stopped by The Ellen DeGeneres Show, where she opened up to host Ellen DeGeneres about co-parenting Luca with Comrie. PHOTOS: Celebs in Bikinis "We are good friends and we laugh a lot and we have a great communication. We share stories and pictures when one is not with Luca. Yeah, he's great, we're great, and we just keep on trucking." Getting along and going on vacation together? These two are clearly completely committed to Luca—and we praise them for it.