Göran Bror Benny Andersson (] ; born 16 December 1946) is a Swedish musician, composer, member of the Swedish music group ABBA (1972–1982), and co-composer of the musicals "Chess", "Kristina från Duvemåla", and "Mamma Mia!". For the 2008 film version of "Mamma Mia!", he worked also as an executive producer. Since 2001, he is active with his own band Benny Anderssons orkester.