Johnny Depp and Penelope Cruz's turn in Pirates of the Caribbean: On Stranger Tides has already broken records internationally, banking a staggering $346.4 million (£216.5 million) over the weekend (20-22May11) to score the world's biggest debut ever.

And the fourth installment of the swashbuckling film series has struck gold in the U.K. too, grossing $18.56 million (£11.6 million) to enter the movie chart at number one.

However, it wasn't enough to topple its prequel, At World's End - the third Pirates outing earned $21.44 million (£13.4 million) when it opened in 2007.

Fast Five, released in Britain as Fast & Furious 5: Rio Heist, remained in second place, while action epic Thor dropped from first to third place.