Glau was classically trained as a ballet dancer and also studied tango and flamenco. There she caught the eye of director Joss Whedon, who later cast her in his critically acclaimed but short-lived TV series Firefly as River Tam, a role she reprised for the show’s feature film sequel, Serenity. Glau voiced Kara Zor-El in the DC Comics original animated movie Superman/Batman: Apocalypse.
