Lisa Marie Presley''s only son, 27-year-old Benjamin Keough was found dead today by an apparent suicide. According to Heavy.com, Benjamin Keough was the second child of Lisa Marie Presley and her first husband, Danny Keough. They had another child together, their oldest child and Lisa Marie's oldest daughter, Danielle Riley Keough who is now 30-years-old. Lisa Marie also has an 11-year-old set of twin daughters, Harper and Finley by her fourth husband, Michael Lockwood. Lisa Marie was married three more times and got divorced three more times after her first marriage to Danny Keough.