Dierks Who? Bentley Debuted at Grand Old Opry in 2003 [VIDEO]Dierks Who? Bentley Debuted at Grand Old Opry in 2003 [VIDEO]Know your Country music history. On this day in Country music history, way back in 2003, Dierks Bentley made his Grand Ole Opry debut. T.C. McCoyT.C. McCoy