Agnetha Faltskog, Bjorn Ulvaeus, Benny Andersson and Anni-Frid Lyngstad met up for an event where they were made Commander of the First Class of the prestigious Order of the Vasa.
The bandmates received their honours from Sweden's King Carl XVI Gustaf, marking the first time that this honour had been given in almost half a century. ABBA were chosen following a stern nomination process, which involved the Swedish government and the public.
Speaking about this honour on the Rosebud With Gyles Brandreth podcast, Bjorn Ulvaeus described it as a "great honour".
"We stood there quietly, accepting it out of the king’s hand and him saying a few words, it was a very quiet and very elegant ceremony", Ulvaeus added. "All four of us of course were there… in public (we see each other) very rarely, and Frida (Lyngstad, also known as Reuss) said to me afterwards, 'this might be the last occasion’".
"Very sad, and I thought about that afterwards, but we’re not getting any younger".
Back in 2021, ABBA reunited for the first time in 50 years with a new album 'Voyage', as well as a hologram inspired virtual tour.
Last April, Ulvaeus also joined up with the cast of London musical Mamma Mia!, which uses ABBA's music, to mark 25 years in the West End. The show premiered in London in 6 April 1999.
This year also marked 50 years since ABBA's remarkable Eurovision victory in Brighton in 1974, where the band stunned the audience with Waterloo.