She was born May 28, 1933 in Idaho to Rulon and Ruby Stanfield and raised in Ogden with sisters Kay Packard, Nancy Farrell Nickell, Susan Wildwood, Barbara Swaner and Sheri Dee. She was married in the Salt Lake LDS Temple to Boyd G. Pett. Their children and spouses are David, Brian and Tamara Pett, Boyd and Wendy Pett, Kathleen and Brian Heckel, Kristine and David Rudolph, Gregory, Stephen and Lisa Pett. They have 21 grandchildren and five great-grandchildren.
Illene graduated from Weber State College and BYU and served in most all positions in LDS Cub Scouts, Primary, Young Women, stake and ward Relief Society and captain and other positions in Daughters of Utah Pioneers and ten years on her company board. She worked as a secretary, substitute school teacher and 24 years as a travel agent. She visited 49 states and 52 countries.