John Kirby was an acting coach and an actor who worked on television series and films. He was Jim Caviezel's longtime acting coach and worked with him on "The Prisoner." Kirby was also an acting coach on The Haves and the Have Nots. Kirby also acted on several television series including Pacific Blue, the original version of MacGyver, and Romance Theatre.

In addition to his career in television, Kirby also worked on many films. He was Caviezel's acting coach on "The Count of Monte Cristo," "I Am David," and "Paul, The Apostle of Christ," and Kirby was also an acting coach on "The Lion, The Witch, and the Wardrobe" and "Scream 4." He also acted in such films as "The Cottonwood," "Almost Summer," and "Zombie Honeymoon."