ABBA have reunited for the first time in eight years, making a public appearance together at the opening party for a new restaurant called Mamma Mia.

The previous get together for the Swedish pop group came for the launch of the movie Mamma Mia in 2008.

Band member Bjorn Ulvaeus told the press that the reunion doesn't mean the band is getting back together.

He said, "We are here to party."

"We took a break in '82, and it was meant to be a break," Ulvaeus said previously.

"It's still a break and will remain so. You'll never see us onstage again. We don't need the money, for one thing. Usuall the reason bands have reunions is that one of them is destitute and the others want to help. Fortunately that has not happened to us."

Mamma Mia began as a musical - featuring ABBA's songs - and was later turned into a movie.

Now fans can go to the Mamma Mia restaurant where they can eat dinner and watch a rendition of the musical.