Benny Andersson is a Swedish musician, composer, and producer, best known as a member of the iconic pop group ABBA. Born on December 16, 1946, in Stockholm, he played the piano and contributed to the band's distinctive sound with his songwriting and arrangements. ABBA achieved global fame in the 1970s and 1980s, producing numerous hit songs like "Dancing Queen" and "Mamma Mia." After ABBA disbanded in 1982, Andersson continued his musical career by composing for theater and film. He co-created the successful musical Chess and has worked on various projects, including the Mamma Mia! musical and its film adaptations.