Also appearing in the movie are Adam Hugill as Rintrah, a minotaur-like being from R'Vaal who is a student at Kamar-Taj; and the creature Gargantos, with its design based on the comic book creature Shuma-Gorath. Ross Marquand voices the Ultron drones that appear on Earth-838. Marquand previously voiced a different version of Ultron in "What If...?", replacing James Spader who portrayed the Earth-616 Ultron in "" (2015). Charlize Theron is introduced in the mid-credits scene as Clea, and screenwriter Michael Waldron makes a cameo appearance as a guest at Palmer's wedding. Bruce Campbell, who worked frequently with director Sam Raimi, briefly appears in the main movie and post-credits scene as the vendor of an Earth-838 restaurant called Pizza Poppa.