This time around, Tish is citing "irreconcilable differences" and asking for full physical and legal custody of their daughter, Noah Cyrus, 13.
Billy Ray and Tish have three children together, including Miley, and he adopted two children Tish had from a previous marriage.
Tish also reportedly wants Billy Ray to pay her attorney's fees and alimony.
And so far, it seems, Miley is Team Mom. On Thursday afternoon she tweeted her dad, "Since your texts and email obviously aren't working would you like to talk like this?" but deleted it a few hours later.
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As of publication, Billy Ray had yet to respond.