Kim Fey and Donnie Wahlberg, in November 2007
08/18/2008 AT 03:45 PM EDT
Donnie Wahlberg and his wife, Kim Fey, both filed for divorce on Aug. 13, court documents in Los Angeles and Ventura County, Calif. show.
Citing irreconcilable differences, Fey is seeking sole physical and legal custody of their two sons – Xavier, 15 and Elijah, 7 – with visitation rights for Wahlberg.
Fey, 39, is also seeking spousal support and attorney's fees from the New Kids on the Block singer, also 39. It wasn't immediately clear what terms Wahlberg is seeking.
The estranged couple were married in August 1999 and separated in January.
A rep for Wahlberg told PEOPLE, "The couple has been separated for some time now and remain friends."