Morty/Rick

Justin Roiland

Summer Smith (voice) / Dream Summer (voice) / Glenn's Wife (voice)

Spencer Grammer

Beth Smith (voice)

Sarah Chalke

Jerry Smith (voice)

Chris Parnell

Ma-Sha

Claudia Black

Prince Nebulon/Radio Voice

David Cross

Giant/Restaurant Owner

Steve Agee

Insurance Salesman/David Letterman

Jeff Bergman

Jessica's Friend/Pregnant Girl

Reagan Gomez-Preston

Leonard Smith

Dana Carvey

Mrs. Pancakes/Scary Melissa/Anchorwoman

Melique Berger

The Devil

Alfred Molina

(voice) / Customs Gromflomite / Glen the Gromflomite (voice)

Eric Bauza

Additional Voices (voice) / Assimilated Alien 3 (voice) / Quick Mystery Judge

Rob Paulsen

(voice) / Additional Voices (voice) / Jessica (voice)

Kari Wahlgren

Scary Terry/Dog Soldier 2

Jess Harnell

Nancy

Aislinn Paul

Gear Head (voice) / Plutonian Chat Show Host 2 / Teenager Employee (voice)

Scott Chernoff

Additional Voices (voice) / Birdperson (voice) / Mr. Nimbus (voice)

Dan Harmon

Dr. Xenon Bloom

John Oliver

Zardoz Head/Teenager Morty Jr.

Richard Christy

Gazorpian

Virginia Hey

Principal Gene Vagina (voice) / Principal Gene Vagina / Mr. Booby Buyer (voice)

Phil Hendrie

Tammy Gueterman (voice) / Tricia Lange (voice) / Miss Lead (voice)

Cassie Steele

King Flippy Nips

Rich Fulcher

Ethan

Dan Benson

Additional Voices (voice) / (voice) / Gene (voice)

Tom Kenny

Narrator

Smith Harrison

Additional Voices (voice) / King of the Sun (voice) / Morty Jr. (voice)

Maurice LaMarche

Johnny/Wife Beater

Adam Ray

Annie/Train Announcement

Jackie Buscarino

Mr. Goldenfold (voice) / Additional Voices (voice) / Mr. Goldenfold

Brandon Johnson

Slippery Stair

Vatche Panos

Lucy

Alejandra Gollas

Paul Fleishman (voice) / Additional Voices (voice) / (voice)

Ryan Ridley

Criminal 2/Assembly Line Worker

Megan Elizabeth Adams

Mrs. Tate/Party Guest 1

Tress MacNeille

Child Morty Jr.

Will Jennings

(voice) / Brad (voice) / Additional Voices (voice)

Echo Kellum

Giant Woman

Cree Summer

Additional Voices (voice) / (voice) / Alien Waiting in Line

Nolan North

Joyce Smith

Patricia Lentz

Guest Voice

Lauren Hillman

(voice) / Additional Voices (voice) / Mr. Twist (voice)

Rob Schrab

Rick Sanchez (voice)

Ian Cardoni

(voice) / Quick Mystery Host / Last Will and Testimeow: Weekend at Dead Cat Lady's House II Announcer

Gary Anthony Williams

Baby Morty Jr.

Finnegan Perry

Morty Smith (voice)

Harry Belden

Slow Mobius/"Party!" Boy

Chris Romano

(voice) / Additional Voices (voice) / Snake Humanoid (voice)

Nick Reczynski

President / Governor Andre Curtis (voice) / Reverse Giraffe (voice)

Keith David

(voice) / Observer Offering Money (voice) / General Carl

Troy Baker

Kendra (voice) / Birddaughter / Amy (voice)

Lauren Tom

(voice)

Albro Lundy

Female Disguise / Story Train Computer (voice) / Presidentress (voice)

Tara Strong

Death Stalker Leader / Knight (voice) / Pussifer (voice)

John DiMaggio

(voice)

Debra Wilson

(voice) / Karen Jamerson / Casino Worker (voice)

Maria Bamford