Abba stars BENNY ANDERSSON and BJORN ULVAEUS will perform with the cast of hit stage musical Mamma Mia! at the Olivier Awards.
The Swedish superstars shot to fame in 1974 after winning the Eurovision Song Contest with their track Waterloo, but they split eight years later and have frequently denied rumours of a reunion.
The stage musical, which has been recreated in theatres worldwide and was even adapted into a feature film, is based on the group's most famous songs, and Abba stars Andersson and Ulvaeus will display their love of the show this weekend (12-13Apr14).
They will join the cast of the musical onstage at the theatre prizegiving ceremony in London on Sunday (13Apr14).