Janeane Garofalo
Beth
David Hyde Pierce
Henry
Michael Showalter
Coop / Alan Shemper
Marguerite Moreau
Katie
Paul Rudd
Andy
Zak Orth
J.J.
Christopher Meloni
Gene
A.D. Miles
Gary
Molly Shannon
Gail
Gideon Jacobs
Aaron
Ken Marino
Victor
Joe Lo Truglio
Neil
Michael Ian Black
McKinley
Liam Norton
Arty
Amy Poehler
Susie
Bradley Cooper
Ben
Marisa Ryan
Abby
Elizabeth Banks
Lindsay
Gabriel Millman
Caped Boy
Kevin Sussman
Steve
Kevin Thomas Conroy
Mork Guy
Christopher Cusumano
Medieval Kid
Cassidy Ladden
Mallrat Girl
Madeline Blue
Cure Girl
Nina Hellman
Nancy
Peter Salett
Guitar Dude
Judah Friedlander
Ron
Jacob Shoesmith Fox
Moose
Whitney Vance
Valerie
Benjamin Coppola
Bobby
H. Jon Benjamin
Can of Vegetables (voice)
Jake Fogelnest
Silas
Ian Helfer
Bear Claw Coach
Jordan MacLean
Alexa
Avi Setton
Standup Comic
Kyle Gallner
Bobby's Buddy
Kathleen Pandolfo
Godspell Girl
Zachary Montgomery-Wicks
Gail's Boy Camper
Danny Hopkins
Raft Camper #1
Christopher Connors
Raft Camper #2
Matt Carmeci
Bunk Boy
Stephen O'Brien
Juke Box Kid #1
Timothy Gasiewski
Juke Box Kid #2
Angel Berlane
Friends, Friends Girl #1
Christi Berlane
Friends, Friends Girl #2
Bob Walz
Drug Dealer
Joseph Kariuki
Kenyan Runner
Donna Mitchell
Gene's Wife
Joe Bryan
Counselor
Christine Loebsack
Counselor
Sandra Kennedy
Counselor
Dan Klein
Jeremy
Samm Levine
Arty (voice) (uncredited)
Keith Oney
Counselor
Joe James
Junkie Squatter (uncredited)