Harry Styles, Louis Tomlinson, Liam Payne, Zayn Malik, and Niall Horan were just teenagers when they became members of One Direction – but how old are they now?
Niall Horan - Wikipedia
Simon Cowell on the Birth of One Direction
One Direction Is 10 Years Old — Here They Are Then Vs. Now
Who Is The Oldest Member Of One Direction? Ages And Birthdays Of Harry Styles, Louis - Capital
One Direction reunion: Signs Harry, Zayn, Niall, Liam and Louis are preparing for a comeback - NZ Herald
Everything Members of One Direction Have Said About Their Time in the Band
One Direction's Harry Styles, Zayn Malik, Niall Horan, Liam Payne and Louis Tomlinson spill the beans on Morgan Spurlock's film This Is Us
Former One Direction Members: Where Are They Now?
One Direction - Wikipedia
How One Direction and New Kids give us that fangirl feeling
Who Is The Oldest Member Of One Direction? Ages And Birthdays Of Harry Styles, Louis - Capital
One Direction: Harry Styles, Niall Horan best chance at Grammy? [POLL] - GoldDerby