Guest Stars Zuzanna Szadkowski as Dorota Kishlovsky Nicole Fiscella as Isabel Coates Amanda Setton as Penelope Shafai Dreama Walker as Hazel Williams Yin Chang as Nelly Yuki Jan Maxwell as Headmistress Queller John Shea as Harold Waldorf Laura Breckenridge as Rachel Carr Kate French as Elle Co Starring Alexis Suarez as Courier Kathy Searle as Realtor Kate Levy as Attorney Parent Uncredited Kristen Bell voices Gossip Girl