Country Star Alan Jackson Selling Tennessee Estate for $23M

Alan Jackson -- one of the OG kings of country music -- is ready to get dethroned ... from his castle-like pad, that is, 'cause he's selling his massive estate.

The two-time Grammy and 16-time CMA Awards winner has listed his majestic hilltop estate in the countryside of Franklin, Tennessee for a whopping $23 million. The 5-bedroom, 8-bathroom crib also has 4 half bathrooms. The house is 22k square feet on just over 4 acres.

The estate is super private ... surrounded by 120 acres of green space. The monumental stone house has a private gated entrance manned 24/7. It's also perfect for a little honky-tonk action. Party in the grand public rooms, sumptuous suites and expansive outdoor living areas ... where you'll find a pool, pool house, outdoor kitchen and terraces.

No barn here, but those with lots of horsepower should get a load of the heated and cooled garages ... big enough for 15 whips. Saddle up!!!