Abba reunite at Mamma Mia!-themed restaurant

Gemma Strong

For the first time in eight years, the members of Abba reunited this week to celebrate the opening of Björn Ulvaeus' new restaurant. The 70-year-old was joined by his former bandmates Benny Andersson, 69, Agnetha Fältskog, 65, and 70-year-old Anni-Frid Lyngstad for the official launch of his eatery, Mamma Mia! The Party, in Stockholm.

The dining-entertainment venue has been based on the Greek tavern featured in the Abba-themed film and stage musical Mamma Mia!, and guests are invited to sing along to the band's tunes and enjoy a show while they dine on a Mediterranean-style buffet.

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Abba reunited on stage this week at the opening of a Mamma Mia!-themed restaurant

"Everything happens on a magical evening in several acts filled with singing and dancing, daredevil stunts, Greek Gods, flirty waiters, and perhaps a zorba and an ouzo or two," the eatery's website promises.

"No evening is like any other and no-one knows how it ends. It all depends on where Abba's songs take us.

The four Abba stars last appeared together in public for the film premieres of Mamma Mia! in London and Stockholm in 2008. To the delight of fans, they posed together on stage at Wednesday's launch – but dismissed the suggestion that they would one day perform together again. "I don't think so," said Benny, while his co-composer Bjorn added: "We are here to party."

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The band pictured together in 1976

The famous quarter – who were once married to each other – took the world by storm when they appeared on stage at the 1974 Eurovision Song Contest singing Waterloo. They went on to sell more than 380 million albums worldwide before they disbanded in December 1982, racking up a number of hit singles, including The Winner Takes It All, Dancing Queen, Take A Chance on Me, and Gimme Gimme Gimme.

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