Justin Timberlake as Dylan Harper

Mila Kunis as Jamie Rellis

Jenna Elfman as Annie Harper

Patricia Clarkson as Lorna

Woody Harrelson as Tommy Bollinger

Richard Jenkins as Mr. Harper

Bryan Greenberg as Parker

Andy Samberg as Quincy

Nolan Gould as Sammy - Sam the Magnificent

Shaun White as Himself

Andrew Fleming as Driver

Catherine Reitman as Female Co-Worker

Courtney Henggeler as Flight Attendant

Masi Oka as Darin Arturo Morena

Tiya Sircar as Hostess

Christopher T. Wood as Ira Ungerleider

Emma Stone as Kayla

Lili Mirojnick as Laura

Rupak Ginn as Male Co-Worker (L.A.)

Duane R. Shepard Sr. as Older Man

Chike Johnson as Taxi Driver

Angelique Cabral as Pam Niborski

Lance Kerfuffle as Security Guard

Jerry Ying as Photographer

Jerry Hyman as Caricaturist

Nick Lee as Dylan's Neighbor

Jason Sung Lee as Dylan's Friend

Michael Morris as Carriage Driver

Brooklyn McLinn as Policeman

Timothy Bish as Dancer

LaJon Dantzler as Dancer

Angel Feliciano as Dancer

Laura Fremont as Dancer

Nicole Guidetti as Dancer

Alicia Mazepa as Dancer

Mayumi Miguel as Dancer

Jermaine Montell as Dancer

Joanna Numata as Dancer

Danielle Polanco as Dancer

Wes Pope as Dancer

Steven Rosa as Dancer

Seth Stewart as Dancer

DeAnna Walters as Dancer

Adam Zotovich as Dancer

Alexandra Gluck as Unaccompanied Minor #1

Taryn Gluck as Unaccompanied Minor #2

Kandé Amadou as Dancer (Flashmob) (uncredited)

Christopher Baskerville as Airport Traveler (uncredited)

Barry Bradford as Basketball Player (uncredited)

Jennifer Brito as FlashMob (uncredited)

William Patrick Brown as Passenger (uncredited)

Jorga Caye as Tour Guide (uncredited)

Tammy Dugen as DeeDee (uncredited)

Teresa Hui as Dancer (uncredited)

Rashida Jones as Maddison (uncredited)

Paul Marra as Tommy's Package Guy (uncredited)

Andrea-Rachel Parker as Flashmob Dancer (uncredited)

Evelina Pereira as Belgian Girl (uncredited)

Alex Phillip as Classmate / Reception Guest (uncredited)

Shane Schoeppner as Airport Diner (uncredited)

Jason Segel as Brice (uncredited)

Uzimann as Hallal Food Vendor (uncredited)

Barbara Vincent as Flash Mob (Grand Central) (uncredited)

James Wallington as Photographer's Assistant (uncredited)

Ryan Dodson as Airport Passenger (uncredited)