Special Guest Stars Charli XCX as Herself Guest Stars Amanda Warren as Camille de Haan Katherine Reis as Pippa Sykes Ella Rubin as Bianca Breer Pico Alexander as Mike Shubin Rick Worthy as Greyson de Haan Cole Doman as Rex Huntington Jarvis Tomdio as Graham Smith Anna Van Patten as Grace Byron Elizabeth Stanley as Charlotte Byron Co Starring Brennan Gomillion as Harris Jens Austin Astrup as Terrell Carter Javier Reyez-Sanchez as Matias Botello Zander Pacella as Jake Byron Shannon Weiss as Jen Shawn K. Jain as Pharmacist Cita Atwell as Freshperson Uncredited Kristen Bell voices Gossip Girl