Wyatt's Rebellion was a limited and unsuccessful uprising in England in early 1554 led by four men, one of whom was Sir Thomas Wyatt. It was given its name by the lawyer at Wyatt's arraignment, who stated for the record that "this shall be ever called Wyat's Rebellion". The rebellion arose out of concern over Queen Mary I's determination to marry a foreigner, Philip II of Spain, and to return England to the Catholic Church and papal authority. The uprising failed, with consequences for the rebels that ranged from death to forgiveness.

Sir Thomas Wyatt the Younger was an English politician and rebel leader during the reign of Queen Mary I; his rising is traditionally called "Wyatt's rebellion". He was the son of the English poet and ambassador Sir Thomas Wyatt.