Watch: ABBA return to the stage as digital Abba-tars
ABBA have reunited on stage in London after a virtual concert that fans said was 'unbelievable'.
The iconic Swedish group — Bjorn Ulvaeus, Agnetha Faltskog, Anni-Frid Lyngstad and Benny Andersson — came together at ABBA Arena for the world premiere of their new Voyage show.
It was the first time they had been together in the UK in public in years.
The stunning show features digital versions of the stars, which look like they did in their heyday and make fans feel as if they are seeing them at the height of their fame.
The group members spent weeks dancing and singing together, with motion capture technology helping to create a full show.
Fans were blown away by the groundbreaking show.
"ABBA Voyage is incredible," one tweeted. "It’s overwhelming and the creative risks Benny and Bjorn have taken are breathtaking. It’s very emotional and as much about ageing, fragility & loss as about joyfully holding onto youth."
"Unbelievable show!" said another. "The sound, the lights, the ABBAtars. You have to see it to appreciate how truly groundbreaking it is."
One said it was the moment they had been waiting for since they were a child, adding that it was an 'amazing' and 'emotional' show.
"Wow... they look amazing!" posted another person.
"I'm crying for joy now, just to see them 4 together is like a little dream came true."
Critics also gave the show the thumbs up, with The Guardian saying it was “so successful that it’s hard not to imagine other artists following suit”.
The Telegraph gave it four our of five stars and said it was “a mind-blowing celebration of some of the greatest pop music ever made”.
iNews also gave the show four stars and said it was “worth the wait”.
Reviewer Kate Solomon said the concert was “sublime” and “flawless”.
Read more: Critics divided over ABBA's comeback album
ABBA formed in 1972 and was known for songs such as Waterloo, The Winner Takes It All and Dancing Queen.
Before their reunion, they last performed together with the original line-up in 1982.
Watch: ABBA fans get excited when they see the band