A Tumblr post. It reads, "Ella Purnell would be the perfect choice to play Alita with those impossibly large eyes of hers." A Tumblr post. It reads, "Ella Purnell would be the perfect choice to play Alita with those impossibly large eyes of hers." By using this site, you are agreeing by the site's terms of use and privacy policy and DMCA policy .