‘Supergirl: Woman of Tomorrow’ Adds David Krumholtz, Emily Beecham (Exclusive) 'House of the Dragon' star Milly Alcock is playing Kara Zor-El, the cousin of Superman. https://www.hollywoodreporter.com/movies/movie-news/supergirl-woman-of-tomorrow-david-krumholtz-emily-beecham-1236103434/