Miley Cyrus' father -- Billy Ray Cyrus -- says he just found out about the video of Miley smoking a bong -- and his first reaction ... "There is much beyond my control right now."
Billy Ray hit his Twitter page to react to the video of Miley smoking what a source says is salvia.
In the brief comment, he sounds upset and apologetic, saying --- "Sorry guys. I had no idea. Just saw this stuff for the first time myself. I'm so sad."