Rainn Wilson

Robert 'Fish' Fishman

Teddy Geiger

Curtis

Josh Gad

Matt Gadman

Emma Stone

Amelia

Christina Applegate

Kim

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

Keir Gilchrist

Moby Type Kid

Brittany Allen

I Heart Matt Girl

Vik Sahay

Gary

Mark Forward

Leon

Jonathan Malen

Jeremy

Rebecca Northan

Jeremy's Mother

Simon Sinn

Mr. Lee

Ennis Esmer

Barney

SuChin Pak

Self

Николь Арбур

Trashy Groupie

Jon Cor

Paul

Talia Russo

Amy

Tanya Bevan

Prom Queen Jennifer

Wesley Morgan

Prom King Josh

Pete Best

Self

Jordan Lawson

Crazy Fan (uncredited)