All four members of Swedish band ABBA took the stage on Sunday night in Stockholm, reports The Expressen
Credit: Source: Niklas Str mstedt/Instagram

Dust off your sequined flares: ABBA is back!

All four members of the Swedish supergroup performed in public for the first time in 30 years in Stockholm on Sunday.

Björn Ulvaeus, Benny Andersson, Agnetha Fältskog and Anni-Frid Lyngstad made the surprise appearance at a party to celebrate the 50th anniversary of Ulvaeus and Andersson’s friendship at the Berns Salonger Hotel in downtown Stockholm, according to The Expressen .

It is the first time that all four members of the band have sung together in public since 1986.

“It was absolutely amazing. A lot of emotions,” Lyngstad, told Espressen after the performance.

“We’ve made this journey throughout our history,” Lyngstad continued. “Benny and Björn in particular. It’s been very nostalgic.”

Songwriter Andersson, 69, added simply, “It’s been a great night.”

Ulvaeus and Andersson first met on June 5, 1966. They later recruited Fältskog and Lyngstad to form ABBA and were propelled to global stardom on the back of a barn-storming 1974 Eurovision Song Contest-winning performance of “Waterloo.” The band went on to sell 380 million albums worldwide.

This run of global success came to an end, however, in 1982 when a series of broken marriages among the band members finally took its toll, causing them to split.

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While Fältskog, 66, and Lyngstad, 70, largely stepped away from the limelight, Ulvaeus, 71, and Andersson, 69, went onto create the Broadway hit Mamma Mia!, which later became a cult movie starring Meryl Streep and Pierce Brosnan.

Yet Sunday’s performance was a far more intimate affair. Fältskog and Lyngstad initially took the stage to perform “You and I,” which they dedicated to Ulvaeus and Andersson, reports the Expressen. In an impromptu move the songwriters then jumped on stage to sing with their bandmates and talk about the history of ABBA.

It’s the second surprise ABBA reunion this year. On Jan. 20, the band members came together to celebrate the launch of Ulvaeus’ new restaurant, Mamma Mia! The Party, in Stockholm.

Fellow Swede and musician Niklas Strömstedt shared a photo from the “special evening” on Instagram.

“I never could have dreamed it would become such a party. I feel like I can die happy having experienced a night like this,” actor Marie Göranzon told Expressen after the ABBA show.

Fellow party guest Janne Schaffer added, “We witnessed a piece of music history tonight.”