Leonard H. McCoy is a character in the Star Trek media franchise. First portrayed by DeForest Kelley in the original Star Trek series, McCoy also appears in the animated Star Trek series, seven Star Trek movies, the pilot episode of Star Trek: The Next Generation, and in numerous books, comics, and video games.Karl Urban assumed the role of the character in the 2009 Star Trek film.

McCoy was born in 2227. The son of David, he attended the University of Mississippi and is a divorcé. In 2266, McCoy was posted as chief medical officer of the USS Enterprise under Captain James T. Kirk who calls him "Bones". McCoy and Kirk are good friends, even "brotherly". The passionate, sometimes cantankerous McCoy frequently argues with Kirk's other confidant, science officer Spock, and occasionally is bigoted toward Spock's Vulcan heritage. McCoy often plays the role of Kirk's conscience, offering a counterpoint to Spock's logic. McCoy is suspicious of technology, especially the transporter; as a physician, he prefers less intrusive treatment and believes in the body's innate recuperative powers. The character's nickname, "Bones", is a play on sawbones, an epithet for physicians, in particular, those qualified as surgeons.

Karl-Heinz Urban (born 7 June, 1972) is a New Zealand actor.

He is known for playing Éomer in the second and third installments of Peter Jackson's The Lord of the Rings trilogy, Dr. Leonard "Bones" McCoy in the 2009 film Star Trek and Caesar on Xena: Warrior Princess. He played Vaako in The Chronicles of Riddick, the Russian assassin Kirill in The Bourne Supremacy, and Ghost in Pathfinder and won acclaim for his performances in New Zealand films The Price of Milk and Out of the Blue.

Urban was born in Wellington, New Zealand. His father, a German immigrant, owned a leather goods store, and his mother once worked for Film Facilities in Wellington, through which the young Urban was exposed to classic New Zealand cinema and developed an interest in the film industry. Urban attended St Mark's Church School, where he showed an early love for public performance. His first acting role came at age eight, when he had a single line in one episode of the New Zealand television series 'Pioneer Woman'. Though continuing to take part in school stage productions, he did not act professionally again until after high school.