What actors and actresses appeared in Pri nikogo - 1975?

You're likely referring to the Russian film "For No One" (Pri nikogo) which was released in 1975. The main actors in this film were:

* Viktor Proskurin as Pavel

* Irina Kupchenko as Natalya

* Alexander Kaidanovsky as Kolya

This film is known for its focus on the psychological complexities of the characters and their struggles with love, loss, and isolation.