Lilian Franck is a German film director and producer, best known for her 2010 documentary Pianomania, a collaborative work with filmmaker Robert Cibis and winner of the Golden Gate Award for Best Documentary at the San Francisco International Film Festival, the German Film Award for Best Sound Design in 2011 and the Semaine De La Critique prize at the Locarno International Film Festival.

Pianomania is a 2009 German-Austrian documentary film by directors Lilian Franck and Robert Cibis. The film presents Stefan Knüpfer, a virtuoso piano tuner from the piano company Steinway & Sons, in his work with pianists such as Lang Lang, Alfred Brendel and Pierre-Laurent Aimard.