Paul

Steven Spielberg

-

Jeffrey Tambor

Adam Shadowchild

Jason Bateman

Agent Zoil

John Carroll Lynch

Moses Buggs

Blythe Danner

Tara Walton

Bill Hader

Haggard

Nick Frost

Clive Gollings

Seth Rogen

Paul (voice)

Mark Sivertsen

State Trooper

Lori Dillen

Robed Woman

Sigourney Weaver

The Big Guy

Simon Pegg

Graeme Willy

Jeremiah Krage

Baker (uncredited)

David House

Security Guard

Kristen Wiig

Ruth Buggs

Jane Lynch

Pat Stevenson

Joel Thingvall

Comic Book Dealer (uncredited)

Jesse Plemons

Jake

David Koechner

Gus

Joe Lo Truglio

O'Reilly

Devin Faraci

Comic Con Nerd (uncredited)

Chris Kittinger

Bar Patron (uncredited)

Robert Amstler

Comic Con Conan (uncredited)

Mia Stallard

Young Tara

Brian Ulrich

-

Phoebe Price

Princess Lea (uncredited)

Greg Mottola

-

J. Todd Anderson

-

Mike Miller

Police Officer

David Fernandez Jr.

Comic Con (uncredited)

Nelson Ascencio

Jorge

Joe Berryman

Gas Station Attendant

Bobby Lee

Valet

Jeremy Owen

Sword Vendor

Jennifer Granger

Adam Shadowchild Fan

Syd Masters

Band Member #1

Gary Roller

Band Member #2

Oliver O'Shea

Band Member #3

Lonnie Otha-Mayer

Band Member #4

Will Veitch

Band Member #5

Brett Michael Jones

Keith Nash

Diego Deane

Fireworks Store Clerk

Dawn Barber

Sailor Moon (uncredited)

Chad Boardsen

-

Larry Goldstein

-

Zack Kennedy

Comic Con Nerd (uncredited)

Paula LaBaredas

Princess Leia (uncredited)

Sylvia Adelina Padilla

Felix the Cat (uncredited)

Chris Rymer

Comic Con Clone Trooper (uncredited)

Joy Sudduth

Angry Stage Manager (uncredited)