Kata Gáspár was Koltai's first choice to play Pipitér, but her father (actor Sándor Gáspár, who plays Dodó) finally didn't let her to star, because of her bad marks in high school. The role went to Orsolya Tóth.
In the original plans Naftalin and Dodó were to be identical twins, both played by actor / director Róbert Koltai. He saw that in this case the entire movie would be about two things - himself and the special effects - so instead the role of Dodó went to Sándor Gáspár.