Göran Bror Benny Andersson (born in Stockholm, Sweden on 16 December 1946) is a Swedish musician, composer, a former member of the Swedish musical group ABBA (1972-1982), and co-composer of the musicals Chess, Kristina från Duvemåla, and Mamma Mia!. Currently active with his own band Benny Anderssons Orkester (BAO!), and executive-producing the film version of the musical Mamma Mia! ABBA is one of the best known 70's musical groups.

Andersson was born to 34-year-old construction engineer Gösta Andersson and his 26-year-old wife Laila. His sister Eva-Lis Andersson followed in 1948.

Andersson's musical background comes basically from his father and grandfather; they both enjoyed playing the accordion, and at six, Benny got his own. Father Gösta and grandfather Efraim taught him Swedish folk music, traditional music, and the odd schlager. Benny recalls the first records he bought were "Du Bist Musik" by Italian schlager singer Caterina Valente and Elvis Presley's rendition of "Jailhouse Rock"; this smörgåsbord of different kinds of music was to influence and follow him through the years.