Co-founder and rhythm guitarist of AC/DC, Malcolm Young, has passed away at the age of 64. Suffering from dementia, he died surrounded by his family and friends. After founding the American rock band with his brother Agnus in 1973, Malco;m Young led an internationally successful career that recorded 15+ albums that sold more than 200 million records worldwide, including 71.5 million albums in the United States, adding them to the list of best-selling music artists in the U.S., and eventually part of the Rock ‘n’ Roll Hall of Fame in 2003. In the band’s official statement, they describe Malco;m Young as “the driving force behind the band.”

Read the band’s full statement below, as posted on their website this morning:

Today it is with deep heartfelt sadness that AC/DC has to announce the passing of Malcolm Young. Malcolm, along with Angus, was the founder and creator of AC/DC. With enormous dedication and commitment he was the driving force behind the band. As a guitarist, songwriter and visionary he was a perfectionist and a unique man. He always stuck to his guns and did and said exactly what he wanted.

He took great pride in all that he endeavored. His loyalty to the fans was unsurpassed. As his brother it is hard to express in words what he has meant to me during my life, the bond we had was unique and very special. He leaves behind an enormous legacy that will live on forever.

Malcolm, job well done.