Trivia

The character of Casey McCall in Sports Night (1998) was loosely based on him.

Played collegiate basketball for Montana State University.

Last name is traditionally pronounced "Kil-burn," but in the US it is commonly pronounced "Kil-born." He has addressed this on the show with Irish guests.

Replaced Tom Snyder as host on the Late Late show in 1999. Was replaced by Craig Ferguson in 2005.

Big fan of Minnesota Timberwolves, especially Kevin Garnett.

Leaving his Late Late Show to "try other things" such as writing and producing television shows. Presumably will also continue to dabble in acting. (septiembre de 2004)

Has a son, Jonathan, born in 1987.