John David Souther (born November 2, 1945) is an American singer, songwriter, and actor. He has written and co-written songs recorded by Linda Ronstadt and the Eagles. Souther is probably best known for his songwriting abilities, especially in the field of country rock. He co-wrote some of the biggest hits for the Eagles, including "Best of My Love", "Victim of Love", "Heartache Tonight", and "New Kid in Town". "How Long", which appears on the Eagles' Long Road Out of Eden, was written by Souther and originally recorded on his first solo album in 1972. Souther recorded two major hit songs in his solo career: "You're Only Lonely" (1979) and "Her Town Too" (1981), a duet with longtime friend James Taylor.