One Direction could become the world's first billion-dollar boy band, but these five young men all come from working-class families. Their upcoming film, "This Is Us," looks back on their lives before their rise to fame on "The X Factor." So in preparation for the film's premiere, check out the lives of the band members before the fame. --Tiara Chiaramonte
Visit Yahoo! Movies to check out all the red carpet action from the "One Direction: This Is Us" premieres in London and New York.