A graduate of the Danish Film Academy, Wiedemann was responsible for granting development and production support to feature films since 1999 as the commissioning editor of the Danish Film Institute. Recently she was assigned head of the new "Talent Development" department. Wiedemann has supervised projects by notable Danish directors, including Lars von Trier, Lone Scherfig, Lukas Moodysson, Susanne Bier and Thomas Vinterberg.