All four members of supergroup ABBA appeared together on Friday at the Swedish premiere of the film "Mamma Mia!", delighting fans with their first public showing for years. The four members are - Benny Andersson, Bjorn Ulvaeus, Anni-Frid Lyngstad -- known as Frida -- and Agnetha Faltskog walked down the red carpet at a Stockholm movie theatre to the cheers of several thousand fans. Full History Here

Agnetha Faltskog (2nd L) and Anni-Frid Lyngstad (2nd R) pose with cast members Meryl Streep (L) and Christine Baranski

Agnetha Faltskog

Agnetha Faltskog (L) and Frida Reuss (R) pose with cast member Meryl Streep

Cast member Pierce Brosnan (L) and Abba member Anni-Frid Lyngstad

Abba member Anni-Frid Lyngstad