Pirates Of The Caribbean: DEAD MAN'S CHEST has broken the $300 million (GBP167 million) barrier at the North American box office quicker than any other movie. The sequel, which stars Johnny Depp, Keira Knightley and Orlando Bloom, has taken a staggering $321.7 million (GBP178.7 million) after only three weeks on release. Dead Man's Chest has already earned more at the box-office than its predecessor managed in six months. It remains at the top of the US box office taking $35 million (GBP19 million) over the weekend.