Swedish musician and composer. After being a member of
ABBA he has, together with
Björn Ulvaeus, created the musicals Chess
?, [Kristina från Duvemåla]
? (based in the Immigrant novels by Swedish writer [Vilhelm Moberg]
?), and [Mamma Mia]
? (based on existing ABBA songs).
He also performs folk music on the accordion together with [Orsa spelemän]?.