George Whitefield, Charles Wesley and John Wesley started the Methodist movement in the 18th century within which church denomination?
Methodism:  It originated as a revival within the 18th century Church of England and became a separate denomination after Wesley's death. John Wesley: John Wesley ( or ; 28 June [O.S. 17 June] 1703 2 March 1791) was an English Anglican cleric and theologian who, with his brother Charles and fellow cleric George Whitefield, founded Methodism.
Church of England