Benny Andersson (ABBA)

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 Andersson with Lyngstad in 1976
Andersson was engaged to Christina Grönvall after she became pregnant by him when Andersson was 16 years old. In 1963, they had a son, Peter Grönvall and, later, a daughter, Hélene. They split in 1966 and Christina never remarried. Christina kept custody of the children as Andersson was then at the peak of his Hep Stars' success. In the 1990s, Peter formed One More Time, a group that enjoyed European success with the ABBA-like "Highland" and, later, as Sweden's entry to the Eurovision Song Contest 1996.

Andersson was engaged to Anni-Frid Lyngstad of ABBA for about nine years. They married in October 1978, but divorced in 1981.

He married Swedish TV presenter Mona Nörklit in November 1981 and had a son, Ludvig (born January 1982), who has since followed in his father's footsteps in forming his own band.