Chloë Grace Moretz as Nimona (voice)

Riz Ahmed as Ballister Boldheart (voice)

Eugene Lee Yang as Ambrosius Goldenloin (voice)

Frances Conroy as The Director (voice)

Lorraine Toussaint as Queen Valerin (voice)

Beck Bennett as Sir Thoddeus Sureblade (voice)

RuPaul as Nate Knight (voice)

Indya Moore as Alamzapam Davis (voice)

Julio Torres as Diego the Squire (voice)

Sarah Sherman as Coriander Cadaverish (voice)

ND Stevenson as Kwispy Dwagon (voice)

Mia Collins as Demon Baby (voice)

Zayaan Kunwar as Young Ballister (voice)

Charlotte Aldrich as Young Gloreth / Additional Voices (voice)

Karen Ryan as Gloreth / Sir Kahren Reehyan / Additional Voices (voice)

Nick Bruno as Sir Nicholas Brun / Additional Voices (voice)

Troy Quane as Sir Troy Quartermane / Additional Voices (voice)

Julie Zackary as Sir Jule Zakaria / Additional Voices (voice)

Randy Trager as Sir Randall Editus / Additional Voices (voice)

Christopher Campbell as Sir Gottem Lilmush (voice)

Cindy Slattery as Syntheya - Voice of the Kingdom / Additional Voices (voice)

Matthew J. Munn as Announcer (voice)

Sommersill Tarabek as Institute Analyst / Additional Voices (voice)

Sebastian Trager as Danks Kid (voice)

Sadie Trager as Concerned Citizen #1 (voice)

Taryn Bruno as Concerned Citizen #2 (voice)

Lincoln Davis as Goldenloin Fan #1 (voice)

Lylianna Eugene as Patience / Additional Voices (voice)

Tim Nordquist as Zombie Movie Voice #1 (voice)

Maurissa Horwitz as Zombie Movie Voice #2 / Additional Voices (voice)

Jake Bruno as Game Commercial Kid #1 / Additional Voices (voice)

Jarrett Bruno as Game Commercial Kid #2 / Additional Voices (voice)

Wesley Turner as Additional Voices (voice)