BILIANA DILKOVA е родена на 26 април 1964 г. в Благоевград. През 1988 г. завършва  „Актьорство за куклен театър“ в НАТФИЗ „Кръстьо Сарафов“ в класа на проф. Атанас Илков. Дипломира се с ролите на Клоун в „Бивалици-небивалици“ от Доналд Бисет, режисьор проф. Юлия Огнянова; Слугинята в „Ала комедия дел’Арте“ по Карло Гоци, режисьор Ищван Наги; Малвина в „Буратино“ от Алексей Толстой, режисьор проф. Славчо Маленов. 

Since 1998, she has been a member of the ensemble at the 'Nikola Vaptsarov' Drama Theatre in Blagoevgrad. Biliana Dilkova has a Ph.D. in 'Cinema Studies, Film Art, and Television' and has been a professor of acting at the 'Neofit Rilski' South-West University in Blagoevgrad since 2005. 

Her roles in the theatre include: 

• Chorus in "Antigone" by Sophocles, director Stavri Karamfilov (1988);
• The Woman in "Nirvana" by Konstantin Iliev, director Stavri Karamfilov (1989);
• The Girl in "I Will Feed You with Faith" based on Nikola Vaptsarov's poetry, director Stavri Karamfilov (1989);
• Actress in "Reigen" by Arthur Schnitzler, director Vladlen Alexandrov (1991);
• Iris in "The Fireplace" by Margarit Minkov, director Margarit Mink (1993);
• Luisa in "Love and Intrigue" by Friedrich Schiller, director Asen Shopov 1998);
• Martirio in "The House of Bernarda Alba" by Federico G. Lorca, director Encho Halachev (1998);
• Lenny in in "Crimes of The Heart" by Beth Henley, director Ognian Spirov (1998);
• Her in "Beans" by Elin Rahnev, director Nedyalko Delchev (1999);
• Nechaev's Wife in "We are Shooting a Film" by Edward Radzinski, director Petrinel Gochev (2000);
• The Wife in "Play №27" " by Aleksey Slapovski, directors Peter Peykov and Alena Georgieva (2000);
• Luisa Mauer in "Bremen Freedom" by Rainer Werner Fassbinder, director Garo Ashikyan (2001);
• Leonardo's Wife in "Blood Wedding" by Federico G. Lorca, director Krum Philipov (2001);
• Elisaveta in "In The Feet of vitosha Mountain" by Peyo Yavorov, director Asen Shopov (2002);
• Gwendeline Fairfax in "The Importance of Being Earnest" by Oscar Wilde, director Bogdan Petkanin (2003);
• Miss Linde in "Nora" by Henrick Ibsen, director Asen Shopov (2004);
• Choir in "The Government Inspector" by Nikolay V. Gogol, director Garo Ashikyan (2005);
• Anette in "Gods of Carnage" by Yasmina Reza, director Peter Stoychev (2007);
• Miss Mishono in "Human Comedy" based on "Father Griot" by Onore de Balzac, director Boyko Bogdanov (2007);
• Fairy in "Dragon's Wedding" by Petko Todorov, director Krum Filipov (2008);
• Sultana in "I Hear Your Voicesby Dimitar Talev, director Boyko Bogdanov (2010);
• Clara in "Doctor" by Branislav Nushich, director Boyko Bogdanov (2010);
• Vida in "Boryana" by Jordan Yovkov, director Boyko Bodanov (2014);
• Witch in "Macbeth" by William Shakespeare, director Grigor Antontov (2012);
• The Nurse in "Little Goodbye Rituals" by Olya Stoyanova, director Yavor Veselinov (2013);
• Vida in "Boryana“ от Йордан Йовков, режисьор Бойко Богданов (2014 г.);
• Mrs. Maslarska in "The Millionaire" by Yordan Yovkov, director Rashko Mladenov (2015);
• Marko's Wife in "Vampire" by Anton Strashimirov, director Margarita Macheva (2016);
• Skirina in "Princess Turandot" " by Carlo Gozzi, director Margarita Macheva (2018);
• Woman in "Vaptsarov: Songs of Man" by Stayko Murjev, Boian Ivanov and Teya Sugareva (2019);
• Haley in "Buried Child" by Sam Shepard, director Nikolay Yordanov (2022);
• Actress in "Theatre in the Park: Shakespeare's Sonnets", director Nikolay Jordanov (2024);
• Arina Panteleymonovna in "The Wedding" by N. V. Gogol, director Rostislav Georgev (2025) and others.

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• Winner of the award in the 'Female Role' category form the Blagoevgrad Theatre Festival in 1998 for Martirio in "The House of Bernarda Alba" by F. G. Lorca, director Encho Halachev;
• Winner of n the 'Female Role' category form the Blagoevgrad Theatre Festival in 1999 for Her in "Beans" by Elin Rahnev, director Nedyalko Delchev;
• Winner of the award in the 'Female Role' category form "Nevena Kokanova" Theatre Festival in Yambol in 2015 for Mrs. Maslarska in "The Millionaire" by Yordan Yovkov, director Rashko Mladenov;