Miley Cyrus' dad Billy Ray, filed for divorce from his wife Tish back in October 2010 but then dropped the filing in March 2011 -- but now the split is back on!

Tish, 53, has filed for divorced from her hubby, 51, after 19 years together. The couple have three children together - Miley, 20, Braison, 19, and Noah, 13. Tish has Brandi, 26, and Trace, 24, from a previous marriage.

Tish cited irreconcilable differences in her filing, according to TMZ. She also asked for spousal support and attorney's fees.

Miley joined the fray and Tweeted at her dad Thursday, writing: "Billy Ray Cyrus, since your text and email obviously aren't working would you like to talk like this?"

Meanwhile, Tish released a statement, reading: "This is a personal matter and we are working to find a resolution that is in the best interest of our family. We ask that you respect our privacy at this time."