Summer Glau Joins Cast Of The Knights Of Badassdom Actress Summer Glau has been cast in The Knights of Badassdom , an upcoming movie from director Joe Lynch (Wrong Turn 2: Dead End). Glau is the first female actor to join the odd-sounding horror comedy, which follows a group of LARPers (live-action role players) who somehow manage to mix it up with what are described as "heavy metal demons," according to Bleeding Cool . The cast already includes Peter Dinklage , Danny Pudi , Steve Zahn and True Blood's Ryan Kwanten . We love the Texas-born Glau, who's well known to audiences for her role as River Tam in both the Firefly TV series and its follow-up movie, Serenity, as well as for playing a deadly female Terminator in Terminator: The Sarah Connor Chronicles. She's also had recurring roles in Dollhouse and The 4400 and has been cast in NBC's upcoming midseason superhero drama The Cape . But though the exotic-looking, somewhat mysterious Glau is quite popu