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Guy of Lusignan (c. 1150 – 18 July 1194) was a French Poitevin knight, son of Hugh VIII of Lusignan and as such born of the House of Lusignan. He was king of Jerusalem from 1186 to 1192 by right of marriage to Sibylla of Jerusalem, and King of Cyprus from 1192 to 1194. Having arrived in the Holy Land (where his brother Aimery of Lusignan was already prominent) at an unknown date, Guy was hastily married to Sibylla in 1180 to prevent a political incident within the kingdom. As the health of his brother-in-law, Baldwin IV of Jerusalem, deteriorated, Guy was appointed by Sibylla as regent for his stepson, Baldwin V of Jerusalem. Baldwin IV died in 1185, followed shortly by Baldwin V in 1186, leading to the succession of Sibylla and Guy to the throne. Guy's reign was marked by increased hostilities with the Ayyubids ruled by Saladin, culminating in the Battle of Hattin in July 1187—during which Guy was captured—and the fall of Jerusalem itself three months later.