The four members of Abba made their first public appearance in 14 years as they premiered their Voyage show in London.
Agnetha, Frida, Benny and Bjorn reunited for the opening night of the concert, which features digital versions of the band.
The launch night was attended by a host of musical stars including Kylie Minogue, Sophie Ellis-Bextor, Jarvis Cocker and Keira Knightley.