Mamma Mia! Abba are back together again for opening

They're one of the most commercially successful music groups in history, with hits that have survived five decades. But ABBA haven’t been glimpsed as a group together for over seven years.

That all changed last night, when the Swedish pop foursome got together for the opening of a new restaurant in Stockholm – where people can eat while watching a show based on the group’s songs.

Agnetha Fältskog, now 65, Björn Ulvaeus, 70, Benny Andersson, 69, and Anni-Frid Lyngstad, 70, were last pictured together in 2008, when they walked the red carpet at the film premiere of Mamma Mia!, based on the musical of the same name. The hit musical which features the disco group’s songs between 1972-1982 was premiered in London in 1999 and saw the album ABBA GOLD top the chartsonce more.

The band were initially reluctant for a musical to be based on their greatest hits including Mamma Mia!, Dancing Queen, Take a Chance on Me, Money Money Money, Knowing Me Knowing You and The Winner Takes It All.

But the show was so successful it spawned a worldwide tour and ran on Broadway for 14 years, making it one of the longest-running productions ever staged there.