In 1988, O’Neill became a born-again Christian and, inspired by her feelings of regret over having an abortion at age 22, became active in the anti-abortion movement. She has since authored several books, including a memoir, Surviving Myself (1999), in which she detailed her career, marriages, experiences with anxiety and postpartum depression, and her religious faith. O’Neill founded the Hope & Healing at Hillenglade foundation in Nashville, Tennessee, an equine therapy foundation that specializes in treating war veterans suffering from post-traumatic stress disorder.