Already having a hard time adjusting at his new school, things take a turn for the bizarre for eleven year old Felix when he accidentally shrinks his strict principal to only fifteen centimetres in height!
| Actor | Role |
|---|---|
 Oskar KeymerFelix Vorndran | Felix Vorndran |
 Lina HüeskerElla Borsig | Ella Borsig |
 Axel SteinPeter Vorndran | Peter Vorndran |
 Justus von DohnányiSchool councilor Henning | School councilor Henning |
 Anja KlingDr. Schmitt-Gössenwein | Dr. Schmitt-Gössenwein |
 Johannes ZeilerJanitor Michalsky | Janitor Michalsky |
 Michael OstrowskiTeacher Mr. Coldegol | Teacher Mr. Coldegol |
| SSiegfried FosterInvestor | Investor |
 Georg SulzerMario Henning | Mario Henning |
 Maximilian EhrenreichChris | Chris |
| EEloi ChristRobert | Robert |
 Daniela PreussSandra Vorndran | Sandra Vorndran |
 Otto WaalkesSpirit of the school founder Otto Leonhard | Spirit of the school founder Otto Leonhard |
| CChrista SchreiberOld rich lady | Old rich lady |
| SSabine LudwigHulda Stechbarth | Hulda Stechbarth |
| AAlexandra HelmigMs. Henning | Ms. Henning |
| AAnnika BeckerDaughter of investor 1 | Daughter of investor 1 |
| MMarie BeckerDaughter of investor 2 | Daughter of investor 2 |
 Joachim ZonsConstruction manager | Construction manager |
| BBasti JohnsonAfrican chief | African chief |