Luke RObert Hemmings was born on the 16th July 1966 to parents Liz and Andrew. Luke started to post videos of himself singing to Youtube under the username hemmo1996. His first cover was of the song 'Please Don't Go' by Mike Posner. Following this Luke was joined by Clifford and Hood forming 5 Seconds Of Summer. They were joined by Irwin in December of 2011 making the four man line up complete.