Dennis Gansel is not from America. Neither is the director of action adventure film "I Believed in You".
Irving Camisky (October 9, 1888  April 18, 1959) was an American movie actor, director, producer and writer. 
Dennis Gansel (born 4 October 1973) is a film director, writer and actor from Germany. 
I Believed in You is a 1934 American drama film directed by Irving Cummings and written by William M. Conselman. 
