The couple, who have a 7-year-old daughter together, citied "irreconcilable differences" as the reason for their split.
U.S. & World
According to a petition filed on December 10 in Los Angeles Superior Court, the couple has been separated since October 1.
This was Walsh's second marriage. He and former Big Love star Melora Walters divorced in 2003 after seven years. They have two children together.