One Direction Makes American Pop History.

One Direction with their Brit Award

One Direction have become the first UK pop group to debut at number one on the US album chart - and called it "a dream come true".

Their first release Up All Night has rocketed into the top spot on the Billboard chart.

The boy band - Harry Styles, Niall Horan, Zayn Malik, Liam Payne and Louis Tomlinson - was formed by TV's The X Factor and signed to Simon Cowell's label Syco.

They are still coming to terms with the success and Styles said today: "We simply cannot believe that we are number one in America.

"It's beyond a dream come true for us. We want to thank each and every one of our fans in the US who bought our album and we would also like to thank the American public for being so supportive of us."