- Sean Giambrone - Reggie (voice)
- Natasha Rothwell - Candace Green (voice)
- Thomas Lennon - Mr. Davenport (voice)
- Terry Fator - Additional Voices (voice)
- Jules Medcraft - Andrea Davenport (voice)
- Greta Gerwig - Self (voice)
- Kelsey Grammer - Abraham Lincoln (voice)
- Patton Oswalt - Mayor Brunson (voice)
- Alanna Ubach - Sonia (voice)
- Eric Edelstein - Geoff (voice)
- Jessica Keenan Wynn - Mrs. Davenport (voice)
- Marieve Herington - Jilly McGee (voice)
- Aparna Nancherla - Sheela (voice)
- D'Arcy Carden - Pango (voice)
- Danny Trejo - Bobby Daniels (voice)
- Greg Baldwin - Bartholomew (voice)
- Greg Baldwin - Barrister Ghost #3
- Jenifer Lewis - Patty (voice)
- Jane Lynch - Ms. Roop (voice)
- Eden Riegel - Abby (voice)
- Eden Riegel - Darryl's Lawyer (voice)
- Eden Riegel - Additional Voices
- Eden Riegel - Harriet (voice)
- Liza Koshy - Jinx (voice)
- Secunda Wood - Ghost Doctor (voice)
- Secunda Wood - Ghost Doctor / Tyrus / Redhead Girl / Black Girl (voice)
- Lara Jill Miller - Libby Stein-Torres (voice)
- Julia Jones - Miss Lightfoot (voice)
- Julia Jones - Ms. Lightfoot (voice)
- Eugene Byrd - Principal O'Connor (voice)
- Eugene Byrd - Principal O'Connor / The Fizz Wizz (voice)
- Leonard Wu - Ruben Chen (voice)
- Leonard Wu - Ruben (voice)
- Pamela Adlon - Ms. Stein-Torres (voice)
- Trevor Devall - Weird Larry (voice)
- Trevor Devall - Weird Larry / City Hall Man / Robot / Robot Dragon (voice)
- Trevor Devall - Ivan the Illusionist (voice)
- Trevor Devall - Irving the Illusionist / Perry (voice)
- Trevor Devall - Weird Larry / Horse Owner (voice)
- Stephanie Sheh - Esther Chen (voice)
- Stephanie Sheh - Esther (voice)
- Rob Cantor - Additional Voices (voice)
- Kari Wahlgren - Grimbella (voice)
- Kari Wahlgren - Grimbella/Georgie (voice)
- Alan Lee - Ollie Chen (voice)
- Alan Lee - Ollie Chen (voice)
- Alan Lee - Ollie (voice)
- Sue Ann Pien - June Chen (voice)
- Sue Ann Pien - June (voice)
- Sue Ann Pien - Esther Chen (voice)
- Jessica DiCicco - Mrry Brunson / Shelly Brunson (voice)
- Jessica DiCicco - Gertrude (voice)
- Jessica DiCicco - Gertrude / Octavius (voice)
- W. Earl Brown - Lord Doom (voice)
- Fred Tatasciore - Hidalgo (voice)
- Fred Tatasciore - Bailiff Ghost (voice)
- Fred Tatasciore - Cornelius Brunson (voice)
- Grey DeLisle - Lucretia (voice)
- Grey DeLisle - Joanie Pataky (voice)
- Grey DeLisle - Deb / Coach Syverstsson (voice)
- Grey DeLisle - Joanie Pataky / Deb (voice)
- Grey DeLisle - Deb (voice)
- John DiMaggio - Sir Alistair (voice)
- John DiMaggio - Sir Alister (voice)
- John DiMaggio - Heidi Hairylegs (voice)
- John DiMaggio - Sir Alister / Connor (voice)
- John DiMaggio - Sir Alister / Heidi Hairylegs (voice)
- John DiMaggio - Billy McGee (voice)
- John DiMaggio - Sir Alister / Heidi Hairy Legs (voice)
- Vincent Rodriguez III - Jeff (voice)
- Alan Lee - Ollie Chen (voice)
- Alan Lee - Oliver Chen (voice)
- Kimberly J. Brown - Blaire (voice)
- Zeno Robinson - West (voice)
- Zeno Robinson - Nashua (voice)
- Zeno Robinson - Nashua / West (voice)
- Jim Rash - JR (voice)
- Carlos Alazraqui - Libby's Dad (voice)
- Baraka May - Abigail (voice)
- Baraka May - Abigail / Jenny (voice)
- Baraka May - Jenny (voice)
- Baraka May - Abigail / Quinby (voice)
- Kimberly Brooks - Aida (voice)
- Kimberly Brooks - Adia
- Kimberly Brooks - Adia (voice)
- Andrew Phung - Mr. Pham (voice)
- Andrew Phung - Mr. Pham / Wayne (voice)
- Tom Kenny - Kenny Star (voice)
- Diedrich Bader - Mr. Bates (voice)
- Diedrich Bader - Mr Bates (voice)
- Tony Hale - Calvin Redtop (voice)
- Joshua Estrada - Sam (voice)
- Erica Luttrell - Pam (voice)
- Jeff Bennett - Elbert (voice)
- Jeff Bennett - Elbert / Ellis (voice)
- Lennon Parham - Miss Fiamma (voice)
- Yvette Nicole Brown - Dianne (voice)
- Paul F. Tompkins - Ernie (voice)
- Sam King
- Stephen Heneveld
- David Knott
- Sam King
- Johnny Castuciano
- Steve Hirt
- Megan Fisher
- Mariam Girgis
- Sammie Crowley
- Cynthia Furey
- Kat Ruzics
- Charley Feldman
- David Wright
- Tatiana Bull
- Bill Motz
- Bob Roth
- Todd Popp
- Steve Loter
- Michael Kramer
- David Neville
- Adam Dib
- Eden Riegel
- Roberto Prado
- Allie Feder
Thomas Lennon interpreta a Mr. Davenport (voice) en la serie.
Eugene Byrd interpreta a Principal O'Connor / The Fizz Wizz (voice) en la serie.
Ashly Burch hace el papel de Molly McGee (voice).
Dana Snyder interpreta a Scratch (voice) en la serie.
Jordan Klepper interpreta a Pete McGee (voice) en la serie.
Sumalee Montano hace el papel de Sharon McGee (voice).
Michaela Dietz interpreta a Darryl McGee (voice) en la serie.
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