Is David McCullough a Mormon? The answer is no.
David McCullough was, however, a guest artist in 2009 at Temple Square, Salt Lake City with the Mormon Tabernacle Choir and Orchestra.
David had become friends with the late Larry H. Miller, a member of The Church of Jesus Christ of Latter-day Saints. Larry had asked David if he would consider working with the Mormon Tabernacle Choir. David responded affirmatively. This led to the 2009 appearance.

David McCullough was born in 1933 in Pennsylvania, and is a two-time Pulitzer Prize winning author, narrator, popular historian, and lecturer. Some of his most famous works include ‘John Adams’ (the biography of John Adams), and ‘1776’ (events surrounding the start of the American Revolutionary War).
In 2006, McCullough received the Presidential Medal of Freedom – the nation’s highest civilian award.
David and his wife, Rosalee, have five children and eighteen grandchildren.