Madison Wolfe: Barbara

Zoe Saldana: Mrs. Mollé

Imogen Poots: Karen

Sydney Wade: Sophia

Rory Jackson: Taylor

Allanah O'Connor: Crony #1

Maya Peters: Crony #2

Art Parkinson: Dave

Jennifer Ehle: Barbara's Mother

Don Wycherley: Principal Marx

Aideen Wylde: Mrs. Potts

Noel Clarke: Mr. Mollé

Sonya Kelly: Mrs. Laney