He was the founder and managing director of the company Folkoperan, which he led for 36 years.
He also wrote libretti to nine operas, including Marie Antoinette, Zarah and JEPPE, as well as penning several books.
Fellbom collaborated with composer Sven-David Sandström on Jeppe: The Cruel Comedy (2001), and made a notorious film of Giuseppe Verdi's Aida, with Folkoperan in 1987, which was performed topless.
He also wrote the libretti for Daniel Börtz's Marie Antoinette (1998) and Svall (2005) and Qu Xiaosong's Oedipus.
You can help Wikipedia by expanding it.This biographical article related to film in Sweden is a stub.