AN21 (Antoine Gabriel Michel Haydamous Josefsson, born Stockholm, Sweden ()August 17, 1989), is a Swedish DJ and record producer. He is the younger brother of Steve Angello, the producer and member of Swedish House Mafia. In DJ Magazine's polls of the top 100 DJs, he was ranked at number 85 in 2011 and number 61 in 2012. AN21 has collaborated with Max Vangeli and signed on his brother's label, Size Records.
AN21 was nominated as "DJ Revelation" in the International Dance Music Awards (IDMAs). In 2010, he appeared as a DJ in several major festivals including Pacha Ibiza, Ministry of Sound in London, Avalon in Los Angeles, Zouk in Singapore, Global Gathering, and Mysteryland.
In 2011, AN21 assembled the compilation "People Of The Night", which was reviewed in issue 497 of DJ Magazine. It collects works of Steve Angello, Dirty South, Swanky Tunes and others. On September 3, 2011, AN21 released the album People Of The Night in collaboration with Max Vangeli on Size Records. The album contains 15 tracks and includes collaborations with Steve Angello, Michael Woods, Tiësto, Congorock, Kim Fai and Moguai, and vocalists Example and Julie McKnight.