In 1978 she finished the State Institute of Theatre Art named after A. V. Lunacharsky.
After that Olga was admitted to the Leningrad State Pushkin Academic Drama Theatre. The young and talented actress was immediately engaged into many performances of the current repertoire of that time. Having played several secondary parts, she was cast for the leading part in the performance Over Clear Water written by V. Belov (1979). Playing a young country girl Dasha, the actress gifted the image with her own traits of character. Dasha was a person of integrity, her strong character united with kindness and openness to this world.  That performance had a long life in the repertoire and was a great success, which is, in many ways, owing to the cast. The young actress appeared dignified and accomplished partner to such outstanding artists as A. V. Sokolov, A. A. Yan, I. P. Dmitriev, R. T. Balashova. She managed to create a bright and remarkable dramatic image.
Olga Hitruk always brought some sort of modernity into the images she worked on. So, it is no coincidence that she found herself at the modern drama (soviet and foreign), not classical. Among the most famous works of the actress there are Kate (Veranda in the Forest, by I. Dvoretsky, 1979), Galya (Uttermost, by I. Gerasimov, 1981), Irenka (The Rush Hour, by E. Stavinsky, 1982), Ingrid (Peer Gynt G. Ibsen, 1984), Olga (Lukia, M. Garaeva, 1985), Gwen Magan (Airport, Arthur Hailey, 1987), Anna ( Cinderella’s First Ball, Eugene Svarts, 1988),   tsarevna Agraphena (A Fairy Tale about Love, G. Garbovitsky, 1989), Vera (Such a Strange Night, V. Zverovchikov, 1993) and others.   
Parts of the classical repertoire came out for her in the age of creative maturity, when she was ready to play comedies and uncover bright and lively images. That time she was really famous for the part of Lipochka in A. N. Ostrovsky`s comedy The Bankrupt, directed by Vladimir Golub, 1990).
A genteel, mannered, spoilt merchant’s daughter suddenly appeared on the stage an opportunistic, strong-willed, deft, determined and cynical woman.  She was very crafty in what concerns her father’s money, making cunning Lazar Podhaluzin act by her order.
Among other famous parts of the classical repertoire played by Olga Hitruk we may notice Marina (The Power of Darkness, Leo Tolstoy, 1987), (Lysistrata, by Aristophanes, directed by Vladimir Golub, 1990), Liza (Vospitannitsa, A. Ostrovsky, directed byAlexander Galibin, 1995), Felisa in melodrama Trees Die Standing by A. Kason (directed by Vladimir Golub, 2001), Fominichna, (A. N. Ostrovsky`s comedy The Bankrupt) directed by Vladimir Golub, 2002), Hortensia (Vanity Fair, written by William Thackeray anddirected by Alexander Belinsky, 2002) and many others.    
For the years of work at the Theatre Olga Hitruk has played over 40 parts. Today she is engaged in Pygmalion (written by B.Show and directed by Alexander Belinsky, 1998).