ABBA
ABBA was an immensely popular Swedish rock group that consisted of two couples when it formed in the early 1970s: already-married Agnetha Faltskog and Bjorn Ulvaeus, and to-be-married Benny Andersson and Anni-Frid Lyngstad.
Both couples divorced in the early 1980s, which led to the band breaking up in 1983.[1]
A Broadway musical featuring ABBA's music was named Mamma Mia! and became the 9th longest-running Broadway show ever until it closed in 2915. The show continued to run with success in London's West End until at least 2020, making it the 6th longest-running show there.