Additionally, Tadanobu Asano, Ray Stevenson, and Zachary Levi reprise their roles as Hogun, Volstagg, and Fandral, respectively, members of the Warriors Three.[23][41] Feige called their appearances "noble ends" that served to establish the threat of Hela and the danger she poses to the main characters.[42] Benedict Cumberbatch reprises his role as Dr. Stephen Strange from the film Doctor Strange (2016) on a brief appearance.[43] Rachel House, who has appeared in several of Waititi's films, plays Topaz, the Grandmaster's chief enforcer,[20][44] while Waititi portrays Korg, a Kronan gladiator who befriends Thor. Waititi provided a motion-capture performance for the character, who is made of rocks, and wanted to do something different by having the character be soft-spoken,[45][46] ultimately basing Korg's voice on that of Polynesian bouncers, as well as his friend and frequent co-star, Rhys Darby.[47][48] Waititi also provided the motion-capture performance for the fire demon Surtur, based on the mythological being Surtr, with Clancy Brown voicing the character.[49] Thor and Hulk co-creator Stan Lee makes a cameo appearance as a man on Sakaar who cuts Thor's hair.[50] There are also several cameos in a sequence where Asgardian actors perform a play based on the events of The Dark World: Sam Neill, with whom Waititi previously worked on Hunt for the Wilderpeople (2016), plays the Odin actor;[51][52] Luke Hemsworth, brother of Chris, plays the Thor actor; Matt Damon plays the Loki actor;[52] and Charlotte Nicdao plays the Sif actor.[53] Scarlett Johansson appears as Natasha Romanoff / Black Widow through archival footage from Avengers: Age of Ultron.[54]