Knall and Fall as Imposters

{{One source|date=April 2025}}

{{Use dmy dates|date=September 2021}}

{{Infobox film

|name = Knall and Fall as Imposters

|image = Knall and Fall as Imposters.jpg

|caption = German film poster

|native_name = {{Infobox name module|de|Knall und Fall als Hochstapler}}

|director = Ulrich Bettac
Hubert Marischka

|producer = Alfred Stöger

|writer = Walter Forster
Jo Hanns Rösler

|starring = {{ubl|Hans Richter|Rudolf Carl|Curd Jürgens}}

|music = Hans Lang

|cinematography = Walter Tuch

|editing = Hermine Diethelm

|studio = Arena-Film
Wiener Mundus-Film

|distributor = Herzog-Filmverleih

|released = {{Film date|1952|11|21|df=yes}}

|runtime = 84 minutes

|country = Austria
West Germany

|language = German

}}

Knall and Fall as Imposters (German: Knall und Fall als Hochstapler) is a 1952 Austrian-German comedy film directed by Ulrich Bettac and Hubert Marischka and starring Hans Richter, Rudolf Carl and Curd Jürgens.{{cite book|first=Robert|last=von Dassanowsky|authorlink=Robert von Dassanowsky|title=Austrian Cinema: A History|publisher=McFarland|year=2005|location=Jefferson, NC|page=151|isbn=978-1-4766-2147-0}} It was followed by a 1953 sequel Knall and Fall as Detectives.

It was shot at the Sievering Studios in Vienna and on location across the city. The film's sets were designed by Fritz Jüptner-Jonstorff.