Karl-Heinz Urban (born 7 June 1972) is a New Zealand actor. His career began with appearances in New Zealand films and TV series such as Xena: Warrior Princess. His first Hollywood role was in the 2002 horror film Ghost Ship. Since then, he has starred in many high-profile movies, including as Éomer in the second and third installments of The Lord of the Rings trilogy, Vaako in the second and third installments of Riddick film series, Leonard McCoy in the Star Trek reboot film series, Kirill in The Bourne Supremacy (2004), John "Reaper" Grimm in Doom (2005), Judge Dredd in Dredd (2012), Gavin Magary in Pete's Dragon (2016), and Skurge in Marvel Studios' Thor: Ragnarok (2017). In 2013, he starred in the sci-fi series Almost Human. Since 2019, he has starred as Billy Butcher in Amazon's superhero streaming television series The Boys.

Filmography