Kevin Costner and wife Christine Baumgartner are divorcing after 18 years of marriage. Baumgartner filed for divorce on Monday, citing “irreconcilable differences” as the reason for the split and asking for joint custody of the kids. Costner also requested joint custody in the response he filed Tuesday through his attorney Laura Wasser, which read: “Spousal support to be payable to petitioner pursuant to the terms of the parties’ Premarital Agreement.”

Costner’s rep said in a statement: “It is with great sadness that circumstances beyond his control have transpired which have resulted in Mr. Costner having to participate in a dissolution of marriage action. We ask that his, Christine’s, and their children’s privacy be respected as they navigate this difficult time.”

The 68-year-old Costner tied the knot with handbag designer Baumgartner, 49, in September 2004 at Costner’s ranch near Aspen, Colorado. The couple share three children together — Cayden, 15, Hayes, 14, and Grace, 12. This is Costner’s second marriage; he and first wife Cindy Silva divorced in 1994. Costner has three adult children with his ex-wife Silva, as well as another adult son with his former girlfriend, Bridget Rooney.

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