Kate Hudson is putting those Nine dance moves to good use! The actress signed on to be a guest star in Glee’s fourth season, and, thanks to two new TwitPics from Ryan Murphy and a premiere promo that just dropped this morning, we now know what her role will be: Cassandra July, Rachel's (Lea Michele) toughie of a dance teacher at NYATA. (Sample exchange: "I bet you were a big star in Iowa." "Actually, I'm from Ohio." "Ohio! Even worse.") Fierce! Watch the fourth season promo below, and see all of Glee's best guest stars in the gallery.