Article continues below advertisementSydney Sweeney is giving fans a peek at her off-duty style - and she's got a little help from her adorable pup, Sully.The Euphoria star took to Instagram to share a playful "pupdate," posing in front of a mirror while hanging out with her dog. Sweeney rocked a braless denim-on-denim look, pairing a cropped jacket with matching jeans that subtly showed off her toned midriff, as she struck a relaxed pose.Article continues below advertisementSource: @sydney_sweeney/InstagramSydney Sweeney shared a mirror photo on Instagram.