Bonjour Kathrin (or Bonjour, Kathrin) is a 1956 West German musical film directed by Karl Anton and starring Caterina Valente, Peter Alexander and Silvio Francesco. It is based on the operetta Die glücklichste Frau der Welt by Max Wallner and Kurt Feltz. It was shot in Eastmancolor at the Wiesbaden Studios in Hesse. The film's sets were designed by the art directors Andrej Andrejew and Helmut Nentwig.