J.D. Souther, the acclaimed singer-songwriter known for co-writing iconic hits for the Eagles and Linda Ronstadt, passed away at the age of 78.

A representative for the Eagles confirmed Souther’s death at his New Mexico home, though no cause or exact date was provided. Souther had been scheduled to kick off a tour next week in Phoenix.

Born on November 2, 1945, in Detroit, Michigan, Souther grew up in Amarillo, Texas, where he developed a love for jazz and country music. After moving to Los Angeles in the late 1960s, he became an integral part of the Southern California rock scene, forming a duo with future Eagles member Glenn Frey, known as Longbranch Pennywhistle. This collaboration eventually led to his deep involvement with the Eagles, who would go on to become one of the most successful rock bands in history.

Souther’s close friendship and professional relationship with Linda Ronstadt also played a pivotal role in his career. He co-wrote several of her most successful songs, including “Faithless Love” and “Prisoner in Disguise.” His collaborations with Ronstadt helped establish her as one of the leading voices of the decade, and the two shared a deep musical connection.

Although Souther found great success as a songwriter, he also pursued a solo career, releasing a number of albums that showcased his distinct voice and songwriting talents. His self-titled debut album in 1972, as well as “Black Rose” (1976) and “You’re Only Lonely” (1979), demonstrated his ability to craft emotionally rich, introspective songs. His 1979 single “You’re Only Lonely” became a Top 10 hit, further solidifying his place in the musical landscape.

A two-time Grammy nominee and member of the Songwriters Hall of Fame, J.D. Souther eventually relocated to Nashville, where he reignited his recording career in 2008 with the jazz-infused album If the World Was You. He continued to release several more albums in the following years, showcasing his versatility as an artist. Souther also ventured into acting, landing a recurring role as a seasoned country music fixer on ABC’s drama Nashville.

He is survived by two sisters, a former wife, and her daughter.

Rest In Peace.