Laura Dern and Ben Harper
10/10/2010 AT 10:55 AM EDT
Musician Ben Harper filed for divorce from actress Laura Dern after five years of marriage, citing irreconcilable differences and seeking joint custody of their two children, PEOPLE confirms.
The papers, filed Friday, claim the pair separated in January, TMZ reports.
Dern, 43, and Harper, 40, were married
in 2005 in Los Angeles. They have a 9-year-old son and a 5-year-old daughter.
– Mike Fleeman