Emmy Rossum as Alexa Walker

Zach Gilford as Johnny Drake

Ashley Springer as Ben Berger

Ana Gasteyer as Ruth Berger

Rooney Mara as Courtney

Sandra Bernhard as Dr. Serena Mohr

Alan Cumming as Grant Matson

Cady Huffman as Dr. Kolton

Brianne Berkson as Gabby

Chris Riggi as Josh

Brea Bee as Mel Drake

Lucy McMichael as Ms. Davis

Suzanne Savoy as Deirdre Walker

Wayne Pyle as Alan Berger

Matthew Garrick as School Principal

Annie Hibbs as Donna

Emily McNamara as Grant's Friend

Adam Fleming as Detention Teacher

Jake Lane as Coffee Shop Twin

Ellis Lane as Coffee Shop Twin

David Brind as Nick

Susan Triggiani as School Secretary

Luka Apt as Student

David J. Bonner as Student

Joe DeMarzio as Party Attendee

John Dufresne-Williams as Student

Nicole Eckenroad as Student

Robert Fazio as Party Attendee

Ben Kamens as Student

Aaron Benjamin Miller as Student

Liz O'Leary as Student

Andy Sinatra as Janitor

David M. Sitbon as Man Crossing Street

Nathan Unsworth as Josh's Jock Buddy

Michael Tamin Yurcaba as Restaurant Patron

Damon Zarro as Student

Michael Braun as Actor