Rainn Wilson

Fish

Christina Applegate

Kim

Teddy Geiger

Curtis

Josh Gad

Matt

Emma Stone

Amelia

Jeff Garlin

Stan

Jane Lynch

Lisa

Jason Sudeikis

David Marshall

Will Arnett

Lex

Howard Hesseman

Gator

Fred Armisen

Kerr

Bradley Cooper

Trash

Lonny Ross

Sticks

Jon Glaser

Billy

Jane Krakowski

Carol

Samantha Weinstein

Violet

Demetri Martin

Kip

Aziz Ansari

Aziz

Ellie Knaus

Erica

Laura de Carteret

Amelia's Mom

Steve Adams

Amelia's Dad

Mark Forward

Leon

Vik Sahay

Gary

Brittany Allen

I Love Matt Girl

Jonathan Malen

Jeremy

Rebecca Northan

Jeremy's Mother

Keir Gilchrist

Moby Type Kid

Simon Sinn

Mr. Lee

SuChin Pak

SuChin Pak

Ennis Esmer

Barney

Nicole Arbour

Trashy Groupie

Wesley Morgan

Prom King Josh

Tanya Bevan

Prom Queen Jennifer

Marvin Karon

School Principal

Sandi Ross

Ms. Kopelson

Talia Russo

Amy

Jon Cor

Paul

Brian Gordon

Tattooed Drummer

Darrel Gamotin

Beat Box Kid

Angela Maiorano-Thurston

Frazzled Stylist

Nick Spencer

Harry

Allan Roberto

Max

Patrick Hagarty

Gund Arena PA (voice)

Jessica Porter

Desk Sergeant

Dave Kiner

Reedy Rocker Guy

Guy Sanvido

Old Barber

Tiffany Boychuk

Boost Mobile Girl

Christian Potenza

Dry Engineer

Pete Best

Pete Best

Jordan Lawson

Crazy Fan (uncredited)