Listen to Billy Ray Cyrus on iHeartRadio

(TMZ) - Billy Ray Cyrus is getting divorced... TMZ has learned.

Billy Ray's wife, Tish Cyrus, is citing "irreconcilable differences" in her filing.  Her decision to pull the plug on the marriage comes 3 years after Billy Ray filed for divorce but dropped it in an attempt to work things out.

Billy Ray and Tish have been married for 19 years and have 5 children, including, of course, Miley.  There's only one minor child left, Noah Cyrus, who is 13. 

Tish is asking for full physical and legal custody, with visitation to Billy Ray.