Sarah Hagan is headed to back to school.

The actress, who we first fell in love with as Millie on Freaks and Geeks, will recur throughout season four on 90210. She'll portray a sorority sister of Naomi's at California University, someone TV Line describes as a natural, intelligent leader.

90210 will return on September 13, with Naomi the only character actually attending college.

Other guest stars that will get involved in her life will include Justin Deeley (as a love interest) and Megalyn Echikunwoke (as an enemy).