In 2003–04, she took up residence in the United Kingdom, though she portrayed Joan Allen's daughter in the US-based comic drama "The Upside of Anger" (with Kevin Costner, Keri Russell, Evan Rachel Wood, and others). Between these two projects, Witt went to South Africa to shoot a film interpretation of the epic poem "Das Nibelungenlied", played one of the central characters Kriemhild in the German TV movie "Kingdom in Twilight" (with title "" in the U.S., and "The Ring of the Nibelungs" and "The Sword of Xanten" elsewhere).