FILE PHOTO: Milly Alcock poses before the Warner Bros. Pictures presentation at CinemaCon, the official convention of Cinema United, in Las Vegas, Nevada, U.S., April 14, 2026. REUTERS/Caroline Brehman/File Photo By Hanna Rantala LONDON, June 18 (Reuters) - "Supergirl" star Milly Alcock says the new DC Studios comic book movie humanises its hero.