Björn Ulvaeus, Benny Andersson, Anna-Frid “Frida” Lyngstad and Agnetha Faltskog took the red carpet at the Rival Hotel while thousands of fans cheered.
The movie Mamma Mia, which is based on different hits by the famous Swedes features several stars, includes Meryl Streep, Pierce Prosnan and Colin Firth. The film tells the story of a daughter who's about to get married and she wants to find out the identity of her father, so after reading her mother's diary, she brings out three men who had been intimate with her mother.
The last time ABBA came together was in 2005, when attending the Mamma Mia musical in Stockholm.
They won the Eurovision Song Contest in 1974 with Waterloo, which was chosen as the best ever Eurovision Song Contest song at the contest´s 50th anniversary show Congratulations, in October 2005.