Several thousand fans cheered as Benny Andersson, Bjorn Ulvaeus, Anni-Frid Lyngstad and Agnetha Faltskog walked down the red carpet in Stockholm.

BBC: Abba quartet at Mamma Mia showing

Agnetha Faltskog is busy promoting her first album in nine years around Europe, and Frida Lyngstad now lives in Mallorca.

BBC: Stockholm museum thanks Abba for the music

Agnetha's single When You Really Loved Someone is out now.

BBC: Abba's Agnetha comes out of retirement