There’s an achy, breaky heart ahead for Billy Ray Cyrus.

After nearly 18 years of marriage, Miley Cyrus’ dad filed for divorce yesterday from wife Tish. Those pesky “irreconcilable differences” were faulted for the move.

In the documents, the country singer asks for joint custody of their three minor kids: Miley, 17, Braison, 16 and Noah, 10.

"As you can imagine, this is a very difficult time for our family," the couple said in a joint statement. "We are trying to work through some personal matters. We appreciate your thoughts and prayers."

Although the filing may come as a surprise to outsiders, those close to the couple are not stunned. “"It was a long time coming. It is the best thing for both of them,” an insider told E!.