Mayim Bialik Seeking Joint Custody in Divorce Petition
11/30/2012 AT 10:00 AM EST
Court documents filed in Los Angeles on Dec. 21 do not list a date of separation for the couple, who are parents to sons Miles, 7, and Fred, 4.
Bialik, 36, who stars on The Big Bang Theory cited "irreconcilable differences" in announcing their split in a statement posted on her Kveller.com parenting blog.
"Divorce is terribly sad, painful and incomprehensible for children," she wrote. "It is not something we have decided lightly."
The former Blossom star penned a book on attachment parenting, released in September, titled Beyond the Sling.
The couple wed in August 2003 in Pasadena, Calif.