Trace Adkins has entered rehab.
The country singer's rep confirmed to E! News that he "has entered a treatment facility after a setback in his battle with alcoholism." The statement added, "As he faces these issues head-on, we ask that his family's privacy will be respected."
The Celebrity Apprentice star has battled the disease for over two decades and sought in-patient treatment in December of 2001.
The news comes shortly after Adkins celebrated his birthday on the Norwegian Cruise Lines Pearl en route to the Caribbean with a few of his friends.
The seven-day trip, dubbed Country Cruising, was scheduled to make stops in Ocho Rios, Jamaica, Cozumel, Mexico, and Grand Cayman. Adkins joined a star-studded roster that was slated to perform on the ship's main theater throughout the journey.