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

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

Kent Osborne

Milton (voice)

Justin Roiland

Additional Voices (voice)

Buzz Osborne

Buzz (voice)

Dale Crover

Dale (voice)

Jarid Root

Melvin/Spaghetti Legs, Additional Voices (voice)

Marky Ramone

Self (voice)

Robert Rodriguez

Self (voice)

Tim Blaney

Additional Voices (voice)

Pamela Adlon

Additional Voices (voice)

Brian Posehn

Charlie Burgers (voice)

Shaquille O'Neal

Shaquille O'Neal (voice)

Jessika Van

Akira / Additional Voices (voice)

Ken Marino

Christopher Columbus (voice)

Tone Loc

Moonman (voice)

Jon Heder

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

Henry Rollins

Skeletony (voice)

Ric Flair

Ric Flair (voice)

Tia Carrere

Additional Voices (voice)

Dee Bradley Baker

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

Lena Headey

Aunt Grandma (voice)

Grey DeLisle

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

Paul Rugg

Troll (voice)

Jackie Buscarino

Jackie (voice)

Bob Joles

Santa / Additional Voices (voice)

Tara Strong

Additional Voices (voice)

Piers Stubbs

English Muffinz (voice)

E. G. Daily

Additional Voices (voice)

Kelley Jakle

Additional Voices (voice)

Scott Menville

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

Steve Blum

Additional Voices (voice)

Dina Sherman

Additional Voices (voice)

Carlos Alazraqui

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

Andrew W.K.

Andrew W.K. (voice)

Jessica DiCicco

Additional Voices (voice)

Billy West

Nubert / Additional Voices (voice)

Mr. Lawrence

Additional Voices (voice)

Cristina Pucelli

Additional Voices (voice)

Rob Schrab

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

Pendleton Ward

Uncle Grandpa / Pizza Steve (voice)

Rich Fulcher

Elf #1 (voice), Additional Voices (voice)

Kari Wahlgren

Jessica (voice), Additional Voices (voice)

'Weird Al' Yankovic

Weird Pal (voice)

Tommy Chong

Bottom Bag (voice)

Jonah Ray Rodrigues

Birdman / Baby Birdman (voice)

Keith David

Santa Claus (voice)

Kelsy Abbott

Additional Voices (voice), Lizzy (voice)

Henry Winkler

Nacho Cheese (voice)

John DiMaggio

Additional Voices (voice), Jake (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)

Mark Hamill

John Bossman (voice)

Michael Dorn

Additional Voices (voice)

Jess Harnell

Additional Voices (voice)

Steve Little

Additional Voices (voice)

Jeff Bennett

Joey (voice), Additional Voices (voice)

Roger Craig Smith

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

Fred Tatasciore

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

Jill Talley

Additional Voices (voice)

Corey Burton

Additional Voices (voice)

Cindy Robinson

Additional Voices (voice)

Phil LaMarr

Additional Voices (voice)

Nika Futterman

Isabella / Additional Voices (voice), Additional Voices (voice), Zeke (voice)

Ben Diskin

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)

Vanessa Marshall

Additional Voices (voice)

Jennifer Hale

Additional Voices (voice)

Lauren Tom

Wen / Additional Voices (voice)

Tyler, The Creator

Additional Voices (voice)

Bill Moseley

Additional Voices (voice)

Jack Fletcher

Additional Voices (voice)

J.J. Villard

Additional Voices (voice)

Audrey Wasilewski

Additional Voices (voice)

Jason Spisak

Additional Voices (voice)

Robert Englund

Boogie Man (voice)

Anders Holm

Deep Dish Dave (voice)

Blake Anderson

Ciabatta (voice)

Sunil Malhotra

Samir (voice)

Zachary Gordon

Belly (Boy) (voice)