[1] Igor Kostolevsky played more than 50 roles in the theater, including Misha Rumyantsev ("Relatives" of Emil Braginsky and Eldar Ryazanov), Metchik ("The rout" of Alexander Fadeyev), Treplev ("The Seagull" Anton Chekhov), Golubkov ("Running" Mikhail Bulgakov), Barber King ("Look who came!"

Vladimir Arro), Valery ("Man in his place" Valentina Chernykh), Pigusov ("Flying birds" by Alexander Galina), Vasily Leonidovich ("Fruits of Enlightenment" by Leo Tolstoy), Torvald Helmer ("The Dollhouse" by Henrik Ibsen) and others.

[1] The critics rated the actor highly in the films Spring Appeal (1976) directed by Pavel Lyubimov and Asya (1977) by Joseph Kheifits.

Then followed the work in the multi-part film And It's All About Him ... based on the novel by Vilya Lipatov, for the main role in which the actor received the Lenin Komsomol Prize.

[1] Among other significant works Kostolevsky in the cinema in the 1970s was the role of the teacher of astronomy Marina Mioryu in the melodrama of Mikhail Kozakov's Nameless Star and one of the shareholders of the cooperative in the comedy Eldar Ryazanov The Garage.

He starred in the films The Dawns Here Are Quiet (1972), A Man Changes Skin (1978), Leave at Your Own Cost (1981), The Tony Wendis Error (1981), Companions (1983) Before Parting (1984), Night Whispers (1985), Through Main Street with an Orchestra (1986), Gobsek (1987), Entrance to the Labyrinth (1989), Lust for Passion (1991), The Ladder of Light (1992), Tango on Palace Square (1993), Nimbus (1994), Square (1995), Another Woman, Another Man (2003), Spy Games (2004-2008), War and Peace (2007), The Time of Happiness (2008), The Blue as the Sea of Eyes (2009), The Tower (2010), and others.