An early convert and leader in the restored Church in the 1830s and early 1840s. Sidney Rigdon served for a time as First Counselor to Joseph Smith in the First Presidency of the Church (D&C 35; 58: 50, 57; 63: 55-56; 76: 11-12, 19-23; 90: 6; 93: 44; 100: 9-11; 124: 126). He later fell away and was excommunicated in September 1844.