Eden Sher

Star Butterfly (voice)

Adam McArthur

Marco Diaz (voice)

Alan Tudyk

Ludo / King River Butterfly (voice)

Daron Nefcy

StarFan13 / Additional Voices (voice)

John Mathot

VHS Guy (voice)

Alex Hirsch

Ben Fotino (voice)

Justin Roiland

Doop-Doop (voice)

Jessica Paré

Chloe (voice)

Isabella Gómez

Teenage Mariposa (voice)

Bryana Salaz

Teenage Meteora (voice)

Max Mittelman

Wyscan (voice)

Desus Nice

Pickles (voice)

The Kid Mero

Needles (voice)

Gemma Whelan

Solaria Butterfly (voice)

Corey Burton

Monster Arm (voice)

Rob Paulsen

Gustav (voice)

April Winchell

Riddle Sphinx (voice)

Danny Woodburn

Pixie Taskmaster (voice)

Anna Camp

Pixie Empress (voice)

Brian Posehn

Lobster Claws (voice)

Stephen Root

Brian (voice)

Gwendoline Yeo

Mrs. Liao (voice)

Jim Gaffigan

Father Time (voice)

Jamie Kennedy

Helios (voice)

Jenny Slate

Pony Head (voice)

Maurice LaMarche

King Pony Head (voice)

Jodi Benson

Singing Teacher (voice)

DeeDee Rescher

Miss Skullnick (voice)

Matt Chapman

Alfonzo (voice)

Minae Noji

Brittney Wong (voice)

Nate Torrence

Ferguson (voice)

Joshua Rush

Jeremy Birnbaum (voice)

Jessica Walter

Meteora Heinous (voice)

Abby Elliott

Janna Ordonia (voice)

Lyons Mathias

Laser Puppy (voice)

Michael C. Hall

Toffee (voice)

Nick Swardson

Sensei (voice)

Rider Strong

Tom Lucitor (voice)

Jon Heder

Oskar Greason (voice)

Jeffrey Tambor

Glossaryck (voice)

Nia Vardalos

Mrs. Diaz (voice)

Mayim Bialik

Willoughby (voice)

Kimaya Thais

Additional Voices

Yvette Nicole Brown

Brigid (voice)

Artt Butler

Rafael Diaz / Vendor (voice)

'Weird Al' Yankovic

Preston (voice)

Sean Schemmel

Box of Truth (voice)

Chris Tergliafera

Rasticore (voice)

Amy Sedaris

Mina Loveberry (voice)

Carl Weathers

Omnitraxus Prime (voice)

Fred Tatasciore

Talon (voice)

Zosia Mamet

Hekapoo (voice)

Esmé Bianco

Eclipsa (voice)

Sonny Ashbourne Serkis

Young River Johansen (voice)

Atticus Shaffer

Dennis (voice)

Arif S. Kinchen

Princess Smooshy (voice)

Dave Allen

Sir Crandle (voice)

Dee Bradley Baker

Lady Lucitor (voice)

Patrick Stump

Ruberiot (voice)

Eric Bauza

Cloudy / Additional Voices (voice)

Jess Harnell

Old Songstrel (singing voice)

Greg Cipes

Aaron Dominic (voice)

Jeff Bennett

Additional Voices (voice)

Kevin Michael Richardson

Rhombulus / Additional Voices (voice)

Jerry Trainor

Roy (voice)

Keith David

Glossaryck (voice)

Mark Gagliardi

Rhombulus' Hands / Pizza Guy (voice)

Grey DeLisle

Queen Moon (voice)

Leigh-Allyn Baker

Mail Monster (voice)

Tress MacNeille

Lady Avarius (voice)

Tom Kenny

Additional Voices (voice)

Greg Ellis

Manfred (voice)

John DiMaggio

Additional Voices (voice)

Danielle Fishel

Librarian (voice)

Dana Davis

Lady Whosits / Additional Voices (voice)

Kate Higgins

White Baby Unicorn (voice)

Phil LaMarr

Kelly's Dad / Additional Voices (voice)

Natasha Rothwell

Brunzetta (voice)

Gary Anthony Williams

Rich Pigeon / Additional Voices (voice)

Jenna Lea Rosen

Mewni Youth Choir (singing voice)

Bennett Abara

Princess Quasar (voice)

Bill Hader

Additional Voices (voice)

Billy West

Hungry Larry (voice)

Bresha Webb

Hornanne Pony Head / Additional Voices (voice)

Carol Kane

Dr. Jelly Goodwell (voice)

Chris Redd

Hypnoslumber (voice)

Damon Jones

Sir Lavabo (voice)

David Krumholtz

Cobalt Ferrero (voice)

Eddie Perino

Seahorse (voice)

Hynden Walch

Babs (voice)

Jaime Camil

Globgor (voice)

James Kyson

Bam Ui Pati Actor (voice)

Josh Sussman

Rock Johansen / Mole Monster / Additional Voices (voice)

Julian Edwards

Additional Voices (voice)

Kari Wahlgren

Baby Meteora (voice)

Laura Silverman

Krysthalle Pony Head / Additional Voices (voice)

Lauren Lapkus

Higgs (voice)

Madeleine McGraw

Young Moon Butterfly (voice)

Maria Bamford

Make-Up Blast (voice)

Natalie Palamides

Foolduke (voice)

Nicole Byer

Princess Arms / Princess Jaggs (voice)

Nika Futterman

Additional Voices (voice)

Ralph Ineson

Demoncist (voice)

Rhys Darby

Eddie (voice)

Roger Craig Smith

Additional Voices (voice)

Ron Lynch

Richard / Flying Pig (voice)

Ross Bryant

Reynaldo (voice)

Scott Menville

Zeke / Corn Cob Vendor (voice)

Steve Little

Spider with a Top Hat (voice)

Tony Hale

Pie King / Additional Voices (voice)

Will Forte

Tyler / Hunter / Chet / Blue Helmet Kid (voice)