Abba reunited at the Swedish premiere of the film Mamma Mia!, for the first time in years.
Benny Andersson, Bjorn Ulvaeus, Anni-Frid Lyngstad - known as Frida - and Agnetha Faltskog were greeted by cheers as they walked down the red carpet for the event.
Agnetha and Frida posed for pictures with actress Meryl Streep, before the three did a dance together.
All four band members then appeared on the theatre balcony.
The film Mamma Mia! has been adapted from the stage show, which has toured the world. It features 22 Abba songs and is set on a Greek island, where a woman about to get married invites her three possible fathers to attend.
Abba, who won the Eurovision Song Contest in 1974, broke up in 1982.
The foursome have not performed in public since 1986.