Kolya and Sasha Popovi - twin brothers who played The Dummies, were discovered by a casting assistant in a shopping mall.
Official music soundtrack was scored by Yuri Bryars, son of the renowned British composer Gavin Bryars.
It is Yuri's debut work for film.
Elisey Mysin, who played Min'ka, is a very young but already acclaimed piano virtuoso, winner of the Blue Bird competition for talented kids in Russia.
The film was shot in Moscow, St Petersburg and Tutaev, a small city on Volga river.