The four members of Swedish pop group ABBA performed together on stage on Sunday night for the first time in more than 30 years , a reunion they had pledged would never happen and which fans had long ceased to expect.

During the gala, Agnetha Faltskog and Anni-Frid Lyngstad performed the Abba song The Way Old Friends Do.

Ulvaeus and Andersson joined in at the end of the song, marking the band’s first public performance in 30 years.

Footage of the performance has yet to surface, but images of the quartet have appeared on social media.

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