Attention, '70s music fans -- ABBA is set to drop a new single.

While the release will be new, the song itself -- 'From a Twinkling Star to a Passing Angel' -- isn't. It's a demo recorded around the time the band's final album, 'The Visitors,' was released in 1981.

The song will be included on an April 23 reissue of 'The Visitors,' along with six previously-released bonus tracks and a DVD featuring rare and unreleased footage of the band.

But don't expect a reunion tour anytime soon. The Swedish pop group, which was comprised of two now-divorced couples, fell apart 30 years ago and never recovered. Since then, they've rarely been seen in the same room together, even declining to reunite when they were inducted into the Rock & Roll Hall of Fame in 2010.

In a 2008 interview, ABBA member Bjorn Ulvaeus said, "We would like people to remember us as we were. Young, exuberant, full of energy and ambition."

At least we'll always have 'Dancing Queen.'

[via Rolling Stone]