Göran Bror Benny Andersson (Swedish pronunciation: [ˈjœːˈran bruːr ˈbɛnɪ ˈandɛˈʂɔn]) (born 16 December 1946), known professionally as Benny Andersson, is a Swedish musician, composer, former member of the Swedish musical group ABBA (1972–1983), and co-composer of the musicals Chess, Kristina från Duvemåla, and Mamma Mia!. As of 2011[update] he is active with his own band Benny Anderssons Orkester (BAO!), and was executive producer for the film version of the musical Mamma Mia!.