News Kate Hudson Shows Off Toned Abs and Flashes Her Shaved Head on 'Sister' Set - See the Pic! By Elisa Osegueda 10:14 AM PDT, September 7, 2017 Now Playing hh:mm:ss Kate Hudson is looking fierce!The 38-year-old actress was spotted in Los Angeles on Wednesday, rocking tiny sky blue shorts and a matching sports bra, while on the set of her new secret project with Sia, titled Sister. RELATED: Kate Hudson Reveals the Surprising Leading Man She Wants to Work With Again BackgridNot much is known about the project, which required the Oscar-nominated star to shave her head in July. But, what we do know is that she’ll star alongside Maddie Ziegler.In a recent interview with ET, Ziegler promised the Sia-directed project would be "unlike anything you've seen before" and credited Hudson with teaching her "everything." EXCLUSIVE: Maddie Ziegler Says Kate Hudson is One Of Her Biggest Inspirations "She's amazing, she's incredible," the teen dancer gushed about the Almost Famous actress. "She's becoming like a family member to me, I love her so much."For more on Ziegler's admiration for Hudson, watch the video below.EXCLUSIVE: Maddie Ziegler Calls Kate Hudson One Of Her Biggest Inspirations Related GalleryHollywood's Hottest Bikini Bods!