Bjrn Kristian Ulvaeus is a Swedish songwriter, producer, a former member of the Swedish musical group ABBA , and cocomposer of the musicals Chess, Kristina frn Duvemla, and Mamma Mia. He coproduced the film Mamma Mia with fellow ABBA member and close friend Benny Andersson.
Bjorn Kristian Ulvaeus was born in Gothenburg, but as a child he moved with his family to Vstervik. His parents were Aina and Erik Gunnar Ulvaeus . Ulvaeus studied business and law at Lund University after doing his military service with standup comedian Magnus Holmstrm.
Source: Wikipedia