Joseph Gordon-Levitt

Tom

Zooey Deschanel

Summer

Geoffrey Arend

McKenzie

Chloë Grace Moretz

Rachel

Matthew Gray Gubler

Paul

Clark Gregg

Vance

Patricia Belcher

Millie

Rachel Boston

Alison

Minka Kelly

Autumn

Charles Walker

Millie's New Husband

Ian Reed Kesler

Douche

Darryl Alan Reed

Bus Driver

Valente Rodriguez

Employee #1

Yvette Nicole Brown

New Secretary

Nicole Vicius

Partygoer

Natalie Boren

Another Partygoer

Maile Flanagan

Rhoda

Darryl Sivad

Usher

Gregory A. Thompson

Minister

Michael Bodie

Man

John Mackie

Mime

Jacob Stroop

Cupid

Kevin Michael

Wedding Singer

Sid Wilner

Grossman

Richard McGonagle

Narrator (voice)

Jean-Paul Vignon

French Narrator (voice)

Bryan Anthony

Dancer

Sybil Azur

Dancer

Cheryl Baxter

Dancer

Gustavo Carr

Dancer

John R. Corella

Dancer

Nadine Ellis

Dancer

Alejandro Estornel

Dancer

Nathaniel Flatt

Dancer

Reshma Gajjar

Dancer

Tiffany Granath

Dancer

Jennifer Hamilton

Dancer

Brandon Henschel

Dancer

Michael Higgins

Dancer

Kenneth Hughes

Dancer

Alexandra Nicole Hulme

Dancer

John Jacquet Jr.

Dancer

Jennifer Lee Keyes

Dancer

Tim Lacatena

Dancer

Rebecca Lin

Dancer

Gelsey Weiss

Dancer

Katie Malia

Dancer

Anthony Marciona

Dancer

Christopher Martinez

Dancer

Vivian Nixon

Dancer

Tracy Phillips

Dancer

Nathan Prevost

Dancer

Jamie Shea

Dancer

Ryan Thomas

Dancer

Christian Vincent

Dancer

Jull Weber

Dancer

Olivia Howard Bagg

Summer - Age 12 (uncredited)

Jason Robinson

The Puma (uncredited)

Chris Connell

Marcus (uncredited)

Samantha Krutzfeldt

Charlie (uncredited)

Kathryn Weisbeck

Summer Lookalike (uncredited)

Eileen Álvarez

Summer Lookalike (uncredited)

Jennifer Hetrick

Sarah (uncredited)

Pleasant Wayne

Tavern Patron (uncredited)