Ashton Fletcher Irwin (born 7 July 1994) is an Australian drummer, singer-songwriter and musician, known for being a member of the Australian pop rock band, 5 Seconds of Summer. Since 2014, 5 Seconds of Summer have sold more than 10 million albums, sold over 2 million concert tickets worldwide, and the band's songs streams surpass 7 billion, making them one of the most successful Australian musical exports in history.