Uncle Grandpa

Peter Browngardt

Uncle Grandpa (voice)

Eric Bauza

Belly Bag / Hot Dog Person (voice)

Kevin Michael Richardson

Mr. Gus (voice)

Adam Devine

Pizza Steve (voice)

Tom Kenny

Additional Voices (voice) / Tiny Miracle (voice) / Tiny Miracle / Additional Voices (voice)

Grey DeLisle

Additional Voices (voice) / Jimmy / Additional Voices (voice) / Josie / Additional Voices (voice) / Little Mac / Additional Voices (voice) / Tommy / Additional Voices (voice)

Kari Wahlgren

Additional Voices (voice) / Jessica (voice)

Dee Bradley Baker

Adam (voice) / Additional Voices (voice) / Messy Bessy (voice)

Audie Harrison

Additional Voices (voice) / Beary Nice (voice) / Beary Nice / Additional Voices (voice)

Rob Schrab

Additional Voices (voice) / Evil Wizard (voice) / Evil Wizard / Additional Voices (voice)

Roger Craig Smith

Additional Voices (voice) / Belson (voice) / Chet / Additional Voices (voice)

Carlos Alazraqui

Additional Voices (voice) / Austin (voice) / Thiago / Additional Voices (voice)

Lena Headey

Aunt Grandma (voice)

Jill Talley

Additional Voices (voice)

Jessica DiCicco

Additional Voices (voice)

Pamela Adlon

Additional Voices (voice)

Brian Posehn

Charlie Burgers (voice)

Scott Menville

Additional Voices (voice) / Riley / Additional Voices (voice)

Steve Blum

Additional Voices (voice)

Michael Dorn

Additional Voices (voice)

Jack Fletcher

Additional Voices (voice)

Vanessa Marshall

Additional Voices (voice)

Jarid Root

Additional Voices (voice) / Melvin/Spaghetti Legs

Kelsy Abbott

Additional Voices (voice) / Lizzy (voice)

Jon Heder

Additional Voices (voice) / Kev / Additional Voices (voice)

Bob Joles

Santa / Additional Voices (voice)

Tara Strong

Additional Voices (voice)

E. G. Daily

Additional Voices (voice)

Dina Sherman

Additional Voices (voice)

Cristina Pucelli

Additional Voices (voice)

John DiMaggio

Additional Voices (voice) / Jake (voice)

Mark Hamill

John Bossman (voice)

Fred Tatasciore

Cloud Wizard / Additional Voices (voice) / Tooth Fairy (voice)

Jeff Bennett

Additional Voices (voice) / Joey (voice)

Nika Futterman

Additional Voices (voice) / Zeke (voice)

Ben Diskin

Additional Voices (voice)

Grant Moninger

Additional Voices (voice)

Kent Osborne

Milton (voice)

Justin Roiland

Additional Voices (voice)

Buzz Osborne

Buzz (voice)

Dale Crover

Dale (voice)

Jose Altuve

Self (voice)

Noah Syndergaard

Self (voice)

Marky Ramone

Self (voice)

Robert Rodriguez

Self (voice)

Tim Blaney

Additional Voices (voice)

Shaquille O'Neal

Shaquille O'Neal (voice)

Jessika Van

Akira / Additional Voices (voice)

Ken Marino

Christopher Columbus (voice)

Tone Loc

Moonman (voice)

Henry Rollins

Skeletony (voice)

Ric Flair

Ric Flair (voice)

Tia Carrere

Additional Voices (voice)

Paul Rugg

Troll (voice)

Jackie Buscarino

Jackie (voice)

Piers Stubbs

English Muffinz (voice)

Kelley Jakle

Additional Voices (voice)

Andrew W.K.

Andrew W.K. (voice)

Rich Fulcher

Additional Voices (voice)

Billy West

Nubert / Additional Voices (voice)

Mr. Lawrence

Additional Voices (voice)

Pendleton Ward

Uncle Grandpa / Pizza Steve (voice)

'Weird Al' Yankovic

Weird Pal (voice)

Tommy Chong

Bottom Bag (voice)

Jonah Ray Rodrigues

Birdman / Baby Birdman (voice)

Keith David

Santa Claus (voice)

Henry Winkler

Nacho Cheese (voice)

Regis Philbin

Easter Bunny (voice)

Sal Governale

Salvador (voice)

Richard Christy

Rick (voice)

MC Hammer

MC Hammer (voice)

Natalie Palamides

Buttercup (voice)

Zach Callison

Steven Universe (voice)

Jess Harnell

Additional Voices (voice)

Steve Little

Additional Voices (voice)

Christopher Alan Archer

Self (voice)

Corey Burton

Additional Voices (voice)

Cindy Robinson

Additional Voices (voice)

Phil LaMarr

Additional Voices (voice)

Mark Bodnar

Additional Voices (voice)

Tress MacNeille

Kimmy / Additional Voices (voice)

Maile Flanagan

Ricky / Additional Voices (voice)

Dave Wittenberg

Additional Voices (voice)

Armin Shimerman

Additional Voices (voice)

Greg Proops

Cupid (voice)

Jennifer Hale

Additional Voices (voice)

Lauren Tom

Wen / Additional Voices (voice)

Tyler, The Creator

Additional Voices (voice)

Angel Deradoorian

Additional Voices (voice)

Arlene Deradoorian

Additional Voices (voice)

Bill Moseley

Additional Voices (voice)

J.J. Villard

Additional Voices (voice)

Audrey Wasilewski

Additional Voices (voice)

Jason Spisak

Additional Voices (voice)

Robert Englund

Boogie Man (voice)

Tom Browngardt

Additional Voices (voice)

Myke Chilian

Additional Voices (voice)

Anders Holm

Deep Dish Dave (voice)

Blake Anderson

Ciabatta (voice)

Sunil Malhotra

Samir (voice)

Zachary Gordon

Belly (Boy) (voice)