Mary Ann Pratt ( (née Frost; born January 14, 1809, Groton, Vermont; d. August 24, 1891 in Pleasant Grove, Utah Territory) was a midwife and early member of the Latter Day Saint movement who was the second wife of Parley P. Pratt, one of the original twelve apostles of the Church of Jesus Christ of Latter Day Saints. She accompanied Parley P. Pratt on several missions, including one to Europe and was instrumental in publishing his writings and poems. Mary Ann joined with the church and followed Brigham Young to Utah with the Mormon pioneers, arriving in Utah Territory in 1852. She is also considered by some to have been one of the plural wives of Joseph Smith the founder of the Latter Day Saint movement. Her life paralleled much of the early history of the church.