Rainn Wilson as Robert 'Fish' Fishman

Teddy Geiger as Curtis

Josh Gad as Matt Gadman

Emma Stone as Amelia

Christina Applegate as Kim

Jeff Garlin as Stan

Jane Lynch as Lisa

Jason Sudeikis as David Marshall

Will Arnett as Lex

Howard Hesseman as Gator

Fred Armisen as Kerr

Bradley Cooper as Trash

Lonny Ross as Sticks

Jon Glaser as Billy

Jane Krakowski as Carol

Samantha Weinstein as Violet

Demetri Martin as Kip

Aziz Ansari as Aziz

Ellie Knaus as Erica

Laura de Carteret as Amelia's Mom

Steve Adams as Amelia's Dad

Keir Gilchrist as Moby Type Kid

Brittany Allen as I Heart Matt Girl

Vik Sahay as Gary

Mark Forward as Leon

Jonathan Malen as Jeremy

Rebecca Northan as Jeremy's Mother

Simon Sinn as Mr. Lee

Ennis Esmer as Barney

SuChin Pak as Self

Николь Арбур as Trashy Groupie

Jon Cor as Paul

Talia Russo as Amy

Tanya Bevan as Prom Queen Jennifer

Wesley Morgan as Prom King Josh

Pete Best as Self

Jordan Lawson as Crazy Fan (uncredited)