Seann William Scott as Anson Wheeler

Paul Rudd as Danny Donahue

Christopher Mintz-Plasse as Augie Farks / Blufgan of Xanthia

Bobb'e J. Thompson as Ronnie Shields

Elizabeth Banks as Beth

Jane Lynch as Gayle Sweeny

Ken Jeong as King Argotron

Ken Marino as Jim Stansel

Kerri Kenney as Lynette Farks

A.D. Miles as Martin

Joe Lo Truglio as Kuzzik of Xanthia

Matt Walsh as Davith of Glencracken

Nicole Randall Johnson as Karen Shields

Allie Stamler as Sara / Esplen, the Goddess of Navalore

Carly Craig as Connie

Jessica Morris as Linda the Teacher

Vincent Martella as Artonius of Xanthia

Armen Weitzman as Party Dude

Jorma Taccone as Mitch from Graphics

Nate Hartley as Rule Master

David Wain as Chevron Baine

Amanda Righetti as Isabel

Tina Casciani as Gretchen

Shane Arenal as Student in Hall

Nina Hellman as Barista

Louis C.K. as Security Guard

Zaid Farid as Tow Truck Driver

Hunter Brochu as Boy in Video

Zandy Hartig as Panda Loving Big

Keegan-Michael Key as Duane

Emily Mostyn-Brown as Laire Singer

Joshua L.K. Patterson as Gleebo

Peter Salett as Ladislas of Pleasure

Lorna Scott as Horse Scooter Woman

Caleb Matthew Collins as Little at Campfire

Nick Nervies as Ronnie's Friend JJ

Kurt Doss as Ronnie's Friend Kyle

Tajh Bellow as Ronnie's Friend Zak

Shawn Huang as Ronnie's Friend Little Jack

Seth Herzog as Bell-Ringing Winged Creature

Eva Card as Chocolate Strawberry Girl

James Henderson as Party Goer

Jenny Robertson as Elevator Mom

Jeanine Jackson as Burger Hole Waitress

Matt Ballard as Valconian Swordsman

Cody Lawrence as Skateboard Kid

Arturo Gil as Chip Monk Puppeteer

Cindy Sorenson as Chip Monk Puppeteer

Matt Malloy as David Garvin (uncredited)

Michelle Lenhardt as Sarah (uncredited)

Nicole Neuman as Sara (uncredited)

George Sharperson as Jailer (uncredited)

Jenn Gotzon Chandler as Sexy Hiker (uncredited)

Mark Kubr as Centaur Man (uncredited)

Samantha Kelly as Centaur Woman (uncredited)

Heather Black as Cassadonian LARP (uncredited)

Gary Sievers as Cassadonian LARP (uncredited)

Martin Pierron as Elf LARP (uncredited)

Gregory Schmauss as Warrior LARP (uncredited)

Lilith Fury as LARPer (uncredited)

Warren Tatoy as LARPer (uncredited)

Jobeth Wagner as LARPer (uncredited)

Stephen Weese as Pirate (uncredited)

David Soldinger as Party Goer (uncredited)