Louis Tomlinson is American.
Louis William Tomlinson ( born Louis Troy Austin ; 24 December 1991 ) is an English singer-songwriter and actor . In 2010 , he became a founding member of One Direction after auditioning as a solo artist on The X Factor . One Direction ( commonly abbreviated as 1D ) are an English-Irish pop boy band based in London , composed of Niall Horan , Liam Payne , Harry Styles , Louis Tomlinson , and previously , Zayn Malik until his departure from the band on 25 March 2015 .