Liam Payne - August 29, 1993 (18 years old) Louis Tomlinson - December 24, 1991 (20 years old) Harry Styles - February 1, 1994 (18 years old) Zayn Malik - January 12, 1993 (19 years old) Niall Horan - September 13, 1993 (18 years old) Hope this helped. :) Follow me on twitter: @Bjork1D