Roy was born on 1 December 1957[2] in Nairobi[3] to Indian parents in a Sikh family. He studied accounting in London before dropping out at 18. He later enrolled in The Slim Wood School of Comedy and got his start in the entertainment arena in England in 1970 as a stand-up comic in local cabaret clubs. In April 1970, Roy opened on the UK stage in Ray Cooney's Miracle Worker at the Palace Theatre, Westcliff-on-Sea. He made his professional screen acting debut in a 1976 episode of The New Avengers, titled "Target!" as a character named Klokoe. He made his film debut later that same year, in The Pink Panther Strikes Again, as the Italian Assassin. Another early role was as Mr. Sin, the "pig-brained Peking Homunculus", a villain with a distinct appetite for homicide, in the Doctor Who serial The Talons of Weng-Chiang. In 1979, Roy played a genetically engineered life form "Decima" in the first season of Blake's 7 episode "The Web", the diminutive chess genius, "The Klute", in the second season of Blake's 7 episode "Gambit" and he voiced the character "Moloch", in the third season of Blake's 7 episode "Moloch". He was a stand-in for the Jedi Master Yoda in Star Wars: The Empire Strikes Back.[citation needed] He is uncredited on the film but can be seen in many behind-the-scenes photos dressed as Yoda for perspective shots filmed towards the end of production.
He has played apes in two movies: Greystoke: The Legend of Tarzan, Lord of the Apes, and again in the Tim Burton remake of Planet of the Apes (2001) in two roles, one as a young gorilla boy and as Thade's niece. He has worked for Burton in three other films, Big Fish (2003), Corpse Bride (2005), where he supplied General Bonesapart's voice, and Charlie and the Chocolate Factory (also 2005).[4] He played all 165 Oompa-Loompas in Charlie and the Chocolate Factory.[5] In referencing his workload during production, director Tim Burton called Roy the "hardest-working man in show biz".[6] Roy had extensive training for the role in dance, yoga, and some minor instrument playing.
He appeared in Transformers: Revenge of the Fallen (2009) as an Egyptian border guard and in the film Star Trek (also 2009) as Keenser, Scotty's assistant on the ice planet Delta Vega; he reprised the Keenser role in the sequels Star Trek Into Darkness and Star Trek Beyond. In one of his more prominent speaking roles, Roy played Aaron, a violent Mumbai-born Mexican criminal in the second season of the HBO comedy Eastbound & Down. Roy starred as Sandeep Majumdar in the 2012 short film The Ballad of Sandeep.[7]