Ross Mullan (born 5 January 1967) is a Canadian-British actor and puppeteer, known for portraying White Walkers on the HBO television series Game of Thrones in its second to fourth seasons.

He immediately started touring with theatre companies all over Europe, the Middle East, and Asia doing musical productions of David Copperfield, Gulliver's Travels, and Sherlock Holmes.

He later transitioned to television doing puppet for a show called Dinotopia, the effects department wanted someone to animate this dinosaur and make it emote like a person.

[citation needed] He played Pemphredo, one of the three blind Stygian witches, in Clash of the Titans (2010); one of the werewolves in Howl; and The Silence and The Teller on Doctor Who.

[3] In June 2012 he played a White Walker in "Valar Morghulis", an episode of the HBO television series Game of Thrones.