K. Brett Nattress was born in Pocatello, Idaho, on March 4, 1965. He married Shawna Lee Adamson in April 1987. They are the parents of seven children.
He attended Brigham Young University and received a bachelor of science degree in physical therapy from the University of Utah in 1990.
He has served in numerous Church callings, including full-time missionary in the California Sacramento Mission, ward Young Men president, bishop, stake Young Men president, stake president, Area Seventy, and mission president.