Andersson & Ulvaeus Fan Page

Benny Andersson (born 16 December 1946) is a Swedish musician, composer, former member of the Swedish musical 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 the Benny Anderssons Orkester (BAO!).

Björn Ulvæus (born 25 April 1945) is a Swedish songwriter, producer, a former member of the Swedish musical group ABBA (1972–82), and co-composer of the musicals Chess, Kristina från Duvemåla, and Mamma Mia!. He co-produced the film Mamma Mia! with fellow ABBA member and close friend Benny Andersson.