Rachael Leigh Cook as Ms. Thorne

Grace Zabriskie as Ms. Funk

Amy Ryan as Ms. Wright

Eddie Jemison as Ron Funk

Stephen Root as Steve

Alex Désert as Sonny

Ron Canada as Smiley

Lucy Davis as Janet Funk

Nadia Dajani as Jean

Michael Leydon Campbell as Bob Funk

Romy Rosemont as Ruthie

Terri Mann as Dr. Day

Shaun Majumder as Raymundo

Dan Martin as Mark

Shelly Desai as Sanjay

Khleo Thomas as Cupcake

Patty Cornell as Ms. Long

Robert John Brewer as Brewer

Christina Elizabeth Cavallero as Gretel

Alyssa Bartholomew as Young Mom

Elisa Nixon as Ms. Nixon

Tyne Firmin as Mr. Got-Rocks

Tania Gunadi as Connie

Anne-Marie Pritchett as Mrs. Berman

Tommy Hinkley as Over-Eaters Anonymous Guy

Sonya Rokes as Laura

Nancy Guerriero as Steve's Mother

Tommy Wilson-O'Brien as Mr. Mann