One Direction are: Liam Payne, 17, Harry Styles, 16, Louis Tomlinson, 18, Niall Horan, 17 and Zayn Malik, 17. The band were formed in the The X Factor's Bootcamp stage, and left the competition in its final round. Since then they've played to sold out arenas as they toured the country with The Official X Factor tour, signed a record deal with Syco, recorded their debut album and released a number 1 bestselling book.