Kelsey Grammer as Blinky
Anton Yelchin as James "Jim" Lake Jr. / Trollhunter [season 1 & 2]
Emile Hirsch as James "Jim" Lake Jr. / Trollhunter [season 3]
Charlie Saxton as Tobias "Toby" Domzalski
Lexi Medrano as Claire Nuñez
Jonathan Hyde as Walt Strickler
Fred Tatasciore as Aaarrrgghh
Victor Raider-Wexler as Vendel
Ron Perlman as Bular
Clancy Brown as Gunmar
Amy Landecker as Barbara Lake
Steven Yeun as Steve Palchuk
Cole Sand as Eli Pepperjack
Matthew Waterson as Draal
Jimmie Wood as NotEnrique
Ike Amadi as Angor Rot
Rodrigo Blaas as Gnome Chompsky
Mark Hamill as Dictatious
Anjelica Huston as Queen Usurna
Lena Headey as Morgana Le Fey
David Bradley as Merlin
Lauren Tom as Mary Wang
Yara Shahidi as Darci Scott