King's Theatre went into the winter of 1993-4 as a leading Derby candidate. On his 1994 debut, however, he proved himself to be a serious contender for the 2000 Guineas by taking a narrow victory in the Craven Stakes. Sent off as 9-2 favourite for the Guineas, he led early but faded into 13th place behind Mister Baileys. A well-beaten fourth place behind Erhaab in the Dante Stakes followed, and his price for the Derby drifted out to 14-1. At Epsom, however, he showed himself to be a top-class middle-distance performer, taking the lead a furlong from home and finishing second of the twenty-five runners behind Erhaab. As a result of his Epsom performance, he was sent off evens favourite for the Irish Derby and duly defeated his male rivals, but could only manage second place to the European Champion filly Balanchine. In the King George VI and Queen Elizabeth Stakes he was sent off at 12-1 and produced his best performance. Always prominent, he was taken wide to make his challenge in the straight, took the lead a furlong out, and won by one and a quarter lengths from White Muzzle, with Erhaab well-beaten in seventh. The race was marred to some extent by the performance of Ezzoud, who unseated his jockey at the start and went on to interfere with several runners. King's Theatre continued to be tried at the highest level, but never won another race. Following his victory at Ascot, he finished third to Ezzoud in the International Stakes and tenth behind Carnegie in the Prix de l'Arc de Triomphe.
In the winter of 1995-1996 he was transferred to Sheikh Mohammed's Godolphin operation and was trained by Saeed bin Suroor. He made only two starts as a five-year-old, finishing second in a minor stakes race at Newbury and third of four to Strategic Choice in the Gran Premio di Milano. He was then retired to stud.
Assessment
King's Theatre was rated the third best juvenile colt in Europe in 1993. At three he was rated at 128 by Timeform and named best three-year-old colt in the Cartier Racing Awards.
Stud career
Retired to stand at stud in Ireland in 1997, King's Theatre had a long and reasonably successful career as a stallion. For several years he was a "shuttle" stallion- standing at the Ballylinch Stud, Kilkenny for part of the year, before being "shuttled" to stand at the Glenlogan Stud Queensland, for the Southern Hemispherebreeding season. His winners on the flat included King's Drama, Young Mick, King's Ironbridge, Royal Code and Red Rioja. Later in his stud career he became better known as the sire of several prominent jumpers, including Riverside Theatre, Captain Chris, Menorah, Wichita Lineman, Voler la Vedette, Cue Card and The New One. King's Theatre died on 13 June 2011 after suffering complications following an operation for colic.