Benny Andersson is a Swedish musician, composer, and arranger. He was a founding member of ABBA, a pop group that achieved worldwide fame during the 1970s. Andersson's passion for music stemmed from his father and grandfather, who played the accordion. He started experimenting with chords at the age of six and took piano lessons at ten. He dropped out of school at 15 and began performing in local clubs, where he met his first partner, Christina Grönvall. In 1964, he became the keyboardist of the rock group Hep Stars and later co-founded ABBA. Andersson's post-ABBA career includes creating musicals such as Chess, Kristina fran Duvemala, and Mamma Mia! with Björn Ulvaeus. In 2001, he formed the Benny Anderssons Orkester, which has released four albums to date. He has won five Swedish Grammys and received numerous other awards for his contributions to music.