Sonny John Moore (born January 15, 1988), known professionally as Skrillex, is an American DJ, record producer, and singer. Raised in Northeast Los Angeles and Northern California, he began his career in 2004 as the lead vocalist of the post-hardcore band From First to Last. He recorded their first two studio albums with the band, Dear Diary, My Teen Angst Has a Bodycount (2004) and Heroine (2006), before leaving to pursue a solo career in 2007. He began his first tour as a solo artist in late 2007. After recruiting a new band lineup, Moore joined the Alternative Press Tour to support bands such as All Time Low and the Rocket Summer, and appeared on the cover of Alternative Press's annual "100 Bands You Need to Know" issue.

After releasing the extended play Gypsyhook (2009), Moore was scheduled to record his debut studio album, Bells, with producer Noah Shain. Although its release was cancelled, he began performing under the name Skrillex and released the dubstep EP, My Name Is Skrillex (2010) as a free download on MySpace. It was followed by Scary Monsters and Nice Sprites (2010) and More Monsters and Sprites (2011), both of which were met with moderate commercial successes. At the 54th Grammy Awards, he won Best Dance/Electronic Album, Best Dance Recording, and Best Remixed Recording, Non-Classical, as well as a nomination for Best New Artist. In late 2011, he was nominated on BBC's Sound of 2012, and was named MTV's Electronic Dance Music Artist of the Year. His debut studio album, Recess (2014) peaked at number four on the Billboard 200. His second and third albums, Quest for Fire and Don't Get Too Close, were released one day apart in 2023.

Moore has won nine Grammy Awards, the most of any electronic dance music act. He has collaborated with Diplo and Boys Noize to form the groups Jack Ü and Dog Blood, respectively. It was announced on his 29th birthday, that he reunited with From First to Last to release the named "Make War". In 2017, Skrillex produced and mixed 8, the eighth studio album by rock band Incubus.