By Whitney Pastorek
Updated April 05, 2009 at 12:00 PM EDT

EW has learned that country star Tim McGraw will not be appearing at tonight’s Academy of Country Music Awards as planned. McGraw has not issued a statement, but his publicist confirms that due to a “major disagreement” with the show’s producers McGraw’s management has pulled him from the show. A rep for the ACMs declined to comment, saying only that they look forward to working with him on tomorrow’s George Strait tribute, at which McGraw is still scheduled to perform. Last night two sources who witnessed the incident told EW that McGraw walked out of yesterday’s ACMs rehearsal, possibly over a dispute about his production design.