Diana Frank (born August 29, 1965, in Boulogne-Billancourt, Île-de-France, France) is a German-French actress, best remembered for her role of reporter Claudia Diehl in the RTL series Der Clown alongside Sven Martinek, with whom she was also romantically involved at the time. In 2008/2009, Frank appeared as Katja Brandner in the ARD primetime soap opera Verbotene Liebe; her character died in episode 3304.