Who could play the main characters in the Soviet screen version of "Scarlet sails"?

Gentle, touching, deep, but thus the simple film, come out in 1961, is the lyrical story about belief in miracles. And fulfillment of desires which come true if very to trust. The screen version Ptushko Alexander is perfectly known to the Soviet viewer though the director from realization of this idea actively was dissuaded by colleagues: on the account Ptushko Alexander at that time were fairy tales: "Cage", "Ilya Muromets", "A stone flower" and others. Wonderful, but nevertheless fairy tales. And here other approach was required. Source: soyuz.ru Ptushko Alexander History about love where it is so easy from lacy transparent romanticism...