The band was founded by Galder (formerly known as Grusom; birth name: Thomas Rune Andersen), who is the sole permanent member of the group.

[1] Old Man's Child was officially founded in 1993, but its roots trace back to 1989 when Galder, Jardar, and Tjodalv formed a death/thrash band called Requiem.

Following the releases of The Pagan Prosperity and Ill-Natured Spiritual Invasion through Century Media, the band embarked on one of their rare tours.

[5][6][7][8][9] This did not materialize, and the band entered an extended period of silence during which Galder appeared to maintain his focus on Dimmu Borgir.

Galder parted ways with Dimmu Borgir in August 2024, announcing that he would finalize the new album and begin touring with Old Man's Child.