Anya Taylor-Joy

as Marla

Jim Gaffigan

as Del (voice)

Gabriel Bateman

as Charlie

Adam Lambert

as Emperor Maximus (voice)

Kenan Thompson

as Bloodbones (voice)

Meghan Trainor

as Fairy Godmother (voice)

Daniel Radcliffe

as Rex Dasher (voice)

Paloma Rodríguez

as Valera (voice)

Maddie Taylor

as Glinara (voice)

Lino DiSalvo

as Robotitron (voice)

Ryan S. Hill

as 6-Year-Old Charlie

Mariah Inger

as Police Officer 1

Annakin Slayd

as Police Officer 2

Harry Standjofski

as Security Guard

Dino Andrade

as Scurvy Pete (voice)

Ian James Corlett

as Dogsled Driver (voice)

Ben Diskin

as Seadog (voice)

Kellen Goff

as Salty (voice)

Dan Navarro

as Viking Leader (voice)

Tito Ortiz

as Royal Guard (voice)

Andrew Pifko

as S.K.U.L.L. Scientist (voice)

Cindy Robinson

as Nola (voice)

Keith Silverstein

as Liam Brooks (voice)

Christopher Corey Smith

as Western Outlaw (voice)

Spike Spencer

as Various Voices (voice)

Karen Strassman

as Dr. Greta Grim (voice)

Kirk Thornton

as Ook-Ook (voice)