Mamma Mia, here we go again.

All four members of the 1970s pop group ABBA have reunited in Stockholm, but sadly for fans it was not to perform.

The group came together with their partners for the opening a new restaurant in the Swedish capital based on the Greek taverna that featured in the Mamma Mia! movie and musical.

The brainchild of former ABBA member Bjorn Ulvaeus, the opening was also attended by Benny Andersson, Anni-Frid Lyngstad, and Agnetha Faltskog.

Questioned by reporters at the opening, Andersson said he did not think the four ABBA members would be back together on stage again.

"We are here to party," said his co-composer Bjorn Ulvaeus.

While ABBA disbanded in 1982, their music has remained popular through films such as Muriel's Wedding and Priscilla: Queen of the Desert.

All four members of the famous pop quartet, who were once two married couples, attended the 2008 premiere of the Mamma Mia film, but they were never photographed as a group.

Anni-Frid Lyngstad — remembered as "the brunette" — arrives with partner Henry Smith. ( Reuters: Anders Wiklund/TT News Agency )

During the restaurant opening on Wednesday, the former ABBA members arrived and left with their respective partners, and joined together, but would not be photographed by the media together.

Some attendees have taken to social media to post photos of the pop group together, looking happy and excited, giving each other kisses on the cheek and cheering.

Bjorn Ulvaeus — once married to Agnetha Faltskog — arrives with his wife Lena Kallersjo. ( Reuters: Anders Wiklund/TT News Agency )

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The Mamma Mia-themed restaurant, called Tyrol and located in Stockholm's Grona Lund, offers a musical show as patrons "step into Mamma Mia! world", according to a statement on Tyrol's website.

For the total price of $224, they will also be offered a Mediterranean buffet, it says.

Everything happens on a magical evening in several acts filled with singing, dancing and daredevil stunts, Greek Gods, flirty waiters and perhaps a Zorba and Ouzpo or two. Part of the deal is an experience for life, where no-one really knows when or how it ends. With the help of ABBA's songs we will create the unique history of each night there and then.

ABBA has sold more than 380 million albums worldwide since the band's breakthrough at the 1974 Eurovision Song Contest.

Mamma Mia! was released in 1975, appeared on ABBA's third, self-titled album, and became one of ABBA's many timeless hits.

Swedish pop group Abba — Bjorn Ulvaeus, Agnetha Faltskog, Anni-frid Lyngstad and Benny Andersson — rose to fame after the 1974 Eurovision Song Festival. ( Lindeborg: AFP )

ABC/Reuters