GettyTish Cyrus is ready to be a bride again -- she just announced she's engaged ... and the husband-to-be is someone who's pretty famous himself on the small screen.
Miley's mom broke the news Sunday, taking to IG with a photo of her and "Prison Break" star Dominic Purcell -- specifically, though, a shot of their hands interlocked and her ring finger on display ... with a giant rock sitting on top. She writes, "A thousand times .... YES"
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