Billy Ray Cyrus knew his marriage to wife Tish was over 10 months before they filed for divorce in October.
The couple announced it was splitting after 17 years together, citing irreconcilable differences in its legal papers, but the Achy Breaky Heart star reveals the cracks were already apparent in their union at the start of 2010 and he struggled to keep his emotions under wraps as he filmed the final season of hit Disney show Hannah Montana with his daughter Miley.
Cyrus tells GQ magazine, "Season four, it was a disaster. I was going to work every single day knowing that my family had fallen apart, but yet I had to sit in front of that camera. I look back and I go, 'How did I ever make it through that?' I must be a better actor than I thought."
In the same candid chat, Cyrus admits signing up to do Hannah Montana was a big mistake that wrecked his whole family.
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