A Mystery Known to All Children from in a summer camp decided to invite a group of famous actors to visit them. Details Casts Galleries Posters Title A Mystery Known to All Release Date 1981-06-01 Runtime 02 Hours 20 Minutes Genres Music Family Comedy Production Companies Dovzhenko Film Studios Production Countries Soviet Union Yulya Zhivotvorova... Юля, пионер... Yuri Prokhoda... Юра, пионер... Nadezhda Rumyantseva... мадам Саламан... Nikolay Grinko... старший пират... Zinovi Vysokovsky... пират Мечтате... Valeriy Nosik... пират Шустрый... Yuriy Sarantsev... помощник Капи... Yuriy Nikolaev... Юрий Николаев... Sergey Alekseev... Серёжа, пионе�... Original Size (1280x720) Original Size (500x750)