Mamma Mia! ABBA members make rare joint appearance.

It’s like one big ’70s musical dream: the four members of iconic Swedish pop group ABBA have made a rare joint appearance in Stockholm.

Agnetha Faltskog, Benny Andersson and Anni-Frid Lyngstad joined Bjoern Ulvaeus at the opening of his Greek Taverna.

Watch the foursome on stage together below. Video via Instagram/@kaspersen.

The Taverna, inspired by the hit musical Mamma Mia!, invites patrons to sing and dance along with ABBA classics while they dine.

The foursome, who were once married to each other and now have separate partners, refused the invite to perform, instead stating they were ‘here to party’. When asked if they’ll ever perform together again, Andersson replied, ‘I don’t think so.’

A photo posted by Rania Shemoun Olsson (@raniatv) on Jan 20, 2016 at 1:51pm PST

While they refused to be photographed together on the red carpet, they did appear together on stage.

This is the first time the quartet have been seen in public together since 2008.

What’s you favourite ABBA memory? Let us know in the comments.