Band members Ben Adams, Mark Read and Christian Ingebrigtsen have reformed for The Big Reunion but it's been a shock stepping back into the dance studio after 11 years away.
In a new sneak peek video, Mark admits: "It's been 11 years since we've been doing routines so it's been a bit of a departure for us. But it's good to be back doing it..."
Ben then jests: "Never lost it...never had it. We're all following Mark because he's the most experienced of us dance-wise. He's got the moves - every move just looks incredible."
Mark then shows off a move - which is actually moving a leg back and forth...
A1 have reformed as a three-piece without original member Paul Marazzi.
Yesterday, we told how Ben, Mark and Christian will speak about a shocking fatal crushing which left four A1 fans dead in Indonesia.
The Big Reunion series two: Then and now
Copyright: Rex Features