The setlist will include hit songs, rarely-played album tracks, two brand new a-ha songs and a few cover versions.
A number of special guests will also join a-ha on stage; Alison Moyet, Ian McCulloch (Echo & The Bunnymen), Ingrid Håvik (Highasakite) and Lissie.
The concert will be broadcast on MTV this fall, and released on CD and DVD on 17 October.
After working on the acoustic set in Oslo since late March, rehearsals resumed at the Ocean Sound Recordings studio at Giske on 10 June. Check out the Instagram accounts of Karl Oluf Wennerberg, Lars Horntveth and Madeleine Ossum for exclusive pictures from the process.
And here’s a picture Morten and violinist Madeleine Ossum at Giske on Monday, apparently.