Udo Dirkschneider is the former singer of Accept and U.D.O.. He was born in 1952 and became one of Germany's most well known metal singers in the 1980s. In November 2011, Dirkschneider's son Sven supported U.D.O. on a date in Germany and became a permanent member of his father's band in February 2015. On the same year, the band was temporary renamed as "Dirkschneider" and embarked in a long tour called "Back To The Roots" where the band only performed Accept songs.