Benjamin Levi "Benji" Madden (born March 11, 1979) is an American guitarist, vocalist, songwriter, and producer. He is the guitarist for the band
Good Charlotte, as well as pop rock collaboration
The Madden Brothers. He formed both of these acts with his identical twin brother,
Joel Madden. Benji is currently a judge on
The Voice Australia. He is married to actress
Cameron Diaz.