A supercouple or super couple (also known as a power couple) is a popular and/or wealthy pairing that intrigues and fascinates the public in an intense or obsessive fashion. The term originated in the United States, and it was coined in the early 1980s when intense public interest in fictional soap opera couple Luke Spencer and Laura Webber, from General Hospital, made the pair a popular culture phenomenon. The term supercouple typically refers to fictional couples from television dramas and film, such as Gone with the Wind's Rhett Butler and Scarlett O'Hara.
https://en.wikipedia.org/wiki/Supercouple