Charles Chu

Joon

Ryan O'Nan

Butch Blossom

Caitlin Stasey

Cherry Swade

Alan Cumming

Uncle

Richard Kind

Fred

Melanie Lynskey

Miss Shoemaker

Christopher Rodriguez Marquette

Buddy

Annie Potts

Aunt

Mercedes Ruehl

Mrs. Fefterg

Dan Bakkedahl

Principal Cochette

Grant Shaud

Tim

Philip Ettinger

Donnie

Mary Rachel Quinn

Deborah

Lance Tafelski

Wolf

Steve Heinz

Security Guard

Peter Jae

Joon's older brother