EntertainmentMoviesSuperhero MoviesSupergirl: Woman of TomorrowHouse of the Dragon star Milly Alcock is officially Supergirl in James Gunn’s DCU – and fans think it’s the perfect castingWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. EntertainmentMoviesSuperhero MoviesSupergirl: Woman of TomorrowHouse of the Dragon star Milly Alcock is officially Supergirl in James Gunn’s DCU – and fans think it’s the perfect castingWhen you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. (Image credit: Getty Images) Best known for playing the young version of Princess Rhaenyra Targaryen in season 1 of the hit Game of Thrones spin-off series House of the Dragon, Alcock also recently made her London theater debut in the National Theatre revival of The Crucible. Until now she has …