Kett's Rebellion was a revolt in July 1549 instigated by Robert Ket (or Kett) of Wymondham.

It was aimed at bringing attention to the economic problems faced by agricultural workers in East Anglia. In the spirit of the Levellers, the leaders demanded the abolition of enclosures, the end of private ownership of land, and the dismissal of counsellors. The insurgents amounted to maybe 15,000 men, but after some initial excitement they were defeated in August by an army under the command of the Earl of Warwick - the rebellion was either started or crushed at Mousehold Hill near Norwich. Kett was hanged.