So ein Flegel is a German film based on the novel Die Feuerzangenbowle

Die Feuerzangenbowle

Die Feuerzangenbowle is a German book, later adapted into several films, which tells the story of a famous writer going undercover as a pupil at a small town gymnasium after his friends tell him that he missed out on the best part of growing up by being educated at home...

. It modifies the story by introducing the concept of two brothers Pfeiffer switching places: While the younger brother takes over his elder brother’s job, the older brother attends the younger one’s school. Heinz Rühmann

Heinz Rühmann

Heinrich Wilhelm "Heinz" Rühmann was a popular German film actor.-Life and work:Rühmann was born in Essen, Westphalia. His role in the 1930 movie Die Drei von der Tankstelle led him to film stardom. He remained highly popular as a comedic actor throughout the 1930s and early 1940s...

 starred in the double role of the brothers Pfeiffer in this lesser known movie a decade before playing Hans Pfeiffer in the more popular 1944 version

Die Feuerzangenbowle (1944 film)

is a 1944 German film, directed by Helmut Weiss and is based on the book of the same name. It follows the book closely as its author, Heinrich Spoerl, also wrote the script for the movie...

.

Cast

• Heinz Rühmann
  Heinz Rühmann
  Heinrich Wilhelm "Heinz" Rühmann was a popular German film actor.-Life and work:Rühmann was born in Essen, Westphalia. His role in the 1930 movie Die Drei von der Tankstelle led him to film stardom. He remained highly popular as a comedic actor throughout the 1930s and early 1940s...
  
   as Dr. Hans Pfeiffer/Erich Pfeiffer
• Ellen Frank as Marion Eisenhut
• Inge Conradi as Ilse Bundschuh
• Annemarie Sörensen as Eva Knauer
• Jakob Tiedtke
  Jakob Tiedtke
  Jakob Tiedtke was a German film actor. He appeared in 194 films between 1914 and 1955.-Selected filmography:* The Doll * Sumurun * Kohlhiesels Töchter * The Expulsion...
  
  as Rektor Knauer
• Else Bötticher as Frau Knauer
• Oskar Sima as Professor Crey
• Franz Weber as Bömmel, Oberlehrer
• Karl Platen as Oertel, Pedell (as Carl Platen)
• Rudolf Platte as Rettig, Tanzlehrer
• Henriette Steinmann as Frau Windscheidt
• Maria Seidler as Frau Bundschuh
• Erwin van Roy as Bürglein, Regisseur
• Walter Steinweg as Springer, Schauspieler
• Anita Mey as Verehrerin
• Evelyn Roberti as Soubrette