In 1985, the author's group received the State Prize of the USSR.
In the first series ("The Revenge of the Cat Leopold"), all the roles were voiced by actor Andrei Mironov. He wanted to be invited to the second series ("Leopold and the Goldfish"), but the actor fell ill, and all four heroes (including the goldfish) spoke in the voice of Gennady Khazanov.
From the third ("The Treasure of Leopold the Cat") to the eleventh series ("The Car of the Leopold the Cat"), all the roles were voiced by Aleksandr Kalyagin (except for the eighth series "Interview with the Cat Leopold", where Mironov's voice sounded again).
In 2015, to the 75th anniversary of Anatoly Reznikov, the sequel of the series "New Adventures of the Cat Leopold" was filmed. The right-holders of the new series are Mondo TV Studios (Italy) and Russian Mobile TV.