The short film entitled Limina will be filmed in the canton of Ticino in September after the production company raised sufficient funds partly through crowdfunding platform indiegogo.
Switzerland's alpine ski racer and Olympic gold medalist, Dominique Gisin, is an associate producer on the film.
The filmmakers describe Limina as being about a ‘gender-fluid' child with a deep curiosity about the lives of the inhabitants of a small picturesque town.
The Ticino municipality of Lavertezzo has been chosen to represent the fictional town.
The open casting is taking place with the support of the Ticino Film Commission. The production company issued the call via Twitter.
Actors are required for a number of roles, including that of main character Alessandra, a child aged eight or nine.
Those interested are asked to send a digital copy of a headshot to firstname.lastname@example.org by July 16th.
Based in Vancouver, the award-winning independent filmmakers operate under the Turbid Lake Pictures banner.
Their last short film project, Whispers of Life, screened around the world, winning a number of awards and being nominated for the Directors Guild of Canada Best Short Film 2014 award.
Halbedl, who grew up in Switzerland, told The Local that he used to visit Ticino as a child and had fond memories of that part of Switzerland.
He and Ferguson had wanted to bring their art to Switzerland and knew this was the right place to make the film.