Taron Egerton Rian Voice Caitriona Balfe Tavra Voice Helena Bonham Carter All-Maudra Voice Harris Dickinson Gurjin Voice Natalie Dormer Onica Voice Theo James Rek'yr Voice Toby Jones Librarian Voice Gugu Mbatha-Raw Seladon Voice Harvey Fierstein The Gourmand Voice Mark Hamill The Scientist Voice Ralph Ineson The Hunter Voice Keegan-Michael Key The Ritual Master Voice Ólafur Darri Ólafsson The Archer Voice Simon Pegg The Chamberlain Voice Alice Dinnean The Ornamentalist Voice Victor Yerrid Hup Voice Lena Headey Maudra Fara Voice Benedict Wong The General Voice Awkwafina The Collector Voice Dave Goelz Baffi Voice Lisa Henson Executive Producer Louis Leterrier Director, Executive Producer Halle Stanford Executive Producer