Ashton Irwin is best known as the drummer and backing vocalist of 5 Seconds of Summer (5SOS), an Australian pop-rock band that rose to global fame in the early 2010s. As part of 5SOS, he helped shape the group's energetic sound that blends pop-punk, alt-rock, and stadium-ready hooks. Beyond his role as a drummer, Ashton has contributed significantly to the band's songwriting, lending emotional depth and rhythmic intricacy to their evolving discography.

In 2020, Ashton launched his solo career with the album Superbloom, which showcased a more introspective, alternative rock sound with influences from artists like Radiohead and Nine Inch Nails. He followed it up in 2024 with Blood on the Drums, a darker, more aggressive record that further established his identity as a solo artist with a strong creative voice.

In addition to his work with 5SOS and his solo projects, Ashton collaborated with ONE OK ROCK on their 2022 album Luxury Disease, co-writing and playing drums on the song Let Me Let You Go. His ability to cross genres and work with international artists like ONE OK ROCK highlights his range and credibility as both a musician and producer in the modern rock landscape.