On Stranger Tides is the first film in the Pirates of the Caribbean 's sequel trilogy .
Pirates of the Caribbean : On Stranger Tides is a 2011 American fantasy swashbuckler film , the fourth installment in the Pirates of the Caribbean film series , is the first film in the sequel trilogy and the sequel to At World 's End ( 2007 ) .
Pirates of the Caribbean-COLON- On Stranger Tides