Guest Stars Katherine Reis as Pippa Sykes Ella Rubin as Bianca Breer Pico Alexander as Mike Shubin Rick Worthy as Greyson de Haan Anna Van Patten as Grace Byron Elizabeth Stanley as Charlotte Byron Frank Whaley as Dennis Keller Co Starring Brennan Gomillion as Harris Victoria Lily Robertson as Sophomore Girl Zander Pacella as Jake Byron Javier Reyez-Sanchez as Matias Botello Ana Yi Puig as Tiff Myers Ariel Eliaz as Sergeant Abby Satty as Skylar Goodwin Gonzalo Aburto de la Fuente as Alejandro Julia Meadows as Rosa Mexicano Hostess Haniq Best as Budtender Henry Trueheart as Luc Leah Curney as Theresa Erin West as Erica Sophie Lee Morris as Budtender Roya Shanks as Odeon Hostess Winslow Bright as Head Teacher Duvall Uncredited Kristen Bell voices Gossip Girl