Neil Young and Pegi Young are splitting after 36 years of marriage.

The “Heart of Gold” singer filed for divorce from his wife on July 29, 2014, according to records obtained by Rolling Stone. The Youngs have not yet commented publicly on the split.

The pair, who married in August 1978, have two children together: a son, Ben, and a daughter, Amber. In 1986, inspired by their son, who has cerebral palsy, Neil and Pegi Young founded The Bridge School, an educational program aimed at serving children with special needs.

The couple has also shared the stage together, as Pegi served as a backup singer on Young’s tour in the 1990s. Rolling Stone notes that they were both slated to play together in Raleigh, North Carolina, on Sept. 13, though Pegi’s name has since been removed from the lineup.