Trivia

On the set of The Chronicles of Riddick (2004), he passed the time by playing Dungeons & Dragons with Vin Diesel, Judi Dench and Thandiwe Newton.

His accent as Dr. Leonard "Bones" McCoy in Star Trek (2009) was so reminiscent of DeForest Kelley that it reportedly moved Leonard Nimoy (who starred alongside Kelley in the original series and films) to tears.

He named his son "Indiana" after Harrison Ford's iconic character Indiana Jones, of whom Karl is a huge fan.

Is an ambassador for KidsCan, a charity that supports more than 16,000 disadvantaged children by providing shoes, food, and coats.

Good friends with co-stars Viggo Mortensen from The Lord of the Rings and Renée O'Connor from Xena: Warrior Princess (1995).

He is, and has almost always been, very active. He worked on his aunt and uncle's farm for many years doing odd jobs. For filming the Lord of the Rings movies, he realized that Eomer was a consummate horseman and he was nowhere near that level, so he invested a lot of time learning: six to eight weeks, five days a week, two hours a day. He wanted to learn to neck rein, a method of steering a horse using one hand while leaving the other hand free to wield a sword. He wanted to be so at one with the horse that he wasn't conscious or concerned about what the horse was doing. In addition, he also enjoys indoor rock climbing.

Has been a huge fan of the 2000 AD Comics' character Judge Dredd since his teens and got to play the character in the film adaptation Dredd (2012).

Enjoys video games, which is what influenced him to take a role in the film adaptation Doom (2005).

Was a huge fan of both the Doctor Who and Star Trek franchises long before being cast as Dr. Leonard "Bones" McCoy in the Star Trek (2009) remake.

Very good friends with his Star Trek (2009) co-stars Chris Pine and Zachary Quinto.

His father is a German immigrant and owned a leather-goods factory. His mother worked for Film Facilities in Wellington, New Zealand.

His hobbies include fishing, surfing, golf and gardening.

Has two sons with his ex-wife Natalie Wihongi: Hunter Urban (b. November 2000) and Indy Urban (b. January 2005).

Started his acting career at the age of 8.

Has a black Lab terrier named Ire (pronounced eye-ree) after a Bob Marley song (from the album "Uprising").

Is a huge fan of rugby union; in particular, the New Zealand All Blacks national team.

Has played the younger versions of iconic characters in two "prequels". He plays Woodrow Call in the Lonesome Dove (1989) prequel Comanche Moon (2008), and Dr. Leonard "Bones" McCoy in Star Trek (2009).

Was introduced in the second installment of each of the three huge franchises he has appeared in: The Lord of the Rings: The Two Towers (2002), The Bourne Supremacy (2004) and The Chronicles of Riddick (2004).

Did roles on Xena: Warrior Princess (1995): Emperor Julius Caesar, Kor the caveman, and Mael (biblical character), Icas's brother. Also did roles on Hercules: The Legendary Journeys (1995): Cupid, son of Aphrodite and Caesar.

Reportedly received a $400,000 bonus for his work on "The Lord of the Rings" [London Daily Mail, December 5, 2003].

His character of Cupid was originally written into the Xena: Warrior Princess (1995) Season 5 finale episode "Motherhood", but Urban was unavailable because he was filming The Lord of the Rings elsewhere in New Zealand. As compensation, Rob Tapert wrote the Season 6 episode "When Fates Collide" specifically for him, this time for his more-popular character of Julius Caesar. Tapert also used this episode as an opportunity to bid farewell to two other fan-favorite recurring characters: Alti and Brutus, portrayed by Claire Stansfield and David Franklin. "When Fates Collide" became one of the most popular episodes of the entire series.

Had a beret and coat to perform self-written Frank Spencer skits at ages 11 and 12 as school assembly entertainment.

Has stated that his favorite Xena: Warrior Princess (1995) episode is A Day in the Life (1997), in which he did not appear.

Was considered for the role of Kainan in Outlander (2008), which went to Jim Caviezel.

Despite sharing a nationality, last name, and first initial, he is not related to singer Keith Urban.

Has replaced Tommy Lee Jones as Woodrow Call in the Lonesome Dove series, and Sylvester Stallone as Judge Dredd. Both characters previously appeared in films opposite Diane Lane.

Has appeared in The Lord of the Rings: The Return of the King (2003), which was previously made as an animated film with the voice of John Huston. Urban later appeared in Comanche Moon (2008), a prequel to Lonesome Dove (1989), which featured Anjelica Huston.

Primary school classmates with Jack Yan.