Lasse Wellander, the Swedish musician and longtime guitarist forABBA, has died.

“Lasse was a dear friend, a fun guy, and a superb guitarist,” they wrote.

Wellander became a professional musician in 1968, playing in bands Blues Quality and then Nature.

Lasse Wellander performs with ABBA at London’s Wembley Arena in 1979

Lasse Wellander performs with ABBA at London’s Wembley Arena in 1979.Gus Stewart/Redferns

Wellander also contributed to the film soundtracks forMamma Mia!andMamma Mia!

Here We Go Again, as well as the band’s 2021 comeback albumVoyage.