Charles Chu

Character: Joon

Ryan O'Nan

Character: Butch Blossom

Caitlin Stasey

Character: Cherry Swade

Alan Cumming

Character: Uncle

Richard Kind

Character: Fred

Melanie Lynskey

Character: Miss Shoemaker

Christopher Rodriguez Marquette

Character: Buddy

Annie Potts

Character: Aunt

Mercedes Ruehl

Character: Mrs. Fefterg

Dan Bakkedahl

Character: Principal Cochette

Grant Shaud

Character: Tim

Philip Ettinger

Character: Donnie

Mary Rachel Quinn

Character: Deborah

Lance Tafelski

Character: Wolf

Steve Heinz

Character: Security Guard

Peter Jae

Character: Joon's older brother