Kir Bulychev was a pen name of Igor Vsevolodovich Mozheiko, a Soviet Russian science fiction writer, critic, translator and historian. His magnum opus is a children's science fiction series Alisa Selezneva, although most of his books are adult-oriented. His books were adapted for film, TV, and animation over 20 times – more than any other Russian science fiction author – and Bulychev himself wrote scripts for early adaptations.

Alisa Selezneva or Seleznyova is the protagonist of an eponymous series of children's science fiction books by Russian writer Kir Bulychev. The first novel of the series was published in 1965, with further writings continuing until Bulychev's death in 2003. The series is known for a wide range of animated and live-action adaptations, with Alisa named as one of the most recognizable faces of Soviet cinema.