Born on 19 June 1980, Julie Deliquet initially studied cinema and trained at the Conservatoire de Montpellier. After attending the Studio-théâtre d'Asnières, she went on to study at the École Internationale Jacques Lecoq. Founder of the In Vitro collective, she directed her first play, Derniers remords avant l'oubli, by Jean-Luc Lagarce in 2009. It won her the Audience Prize in the Théâtre 13 Young Directors competition. In 2011, she took part in the writing of Hold-on, in which she also acted. The same year, she directed Brecht's La Noce (A Respectable Wedding) at the Théâtre de Vanves, then presented it at the Centquatre-Paris during the Impatience festival. 

In 2016, she created Vania, based on Anton Chekhov, at the Comédie-Française. She directed Dominique Blanc, Hervé Pierre and Stéphane Varupenne. The following year, she again adapted Chekhov's Three Sisters and Ivanov at the Théâtre de Lorient. She has also been teaching at La Fabrique, a drama school in Champigny-sur-Marne since 2010, and at the Comédie de Saint-Étienne school. She was appointed director of the Théâtre Gérard-Philipe, the national drama centre in Saint-Denis, in March 2020. 

Throughout her career, Julie Deliquet has questioned the responsibility of individuals on the scale of their collective commitments. In all her plays, she places the actor and the group at the centre, to tell the story of how we choose, or don't choose, to create together. Initially working with improvisation, she progressively turned to adaptations of texts from the repertoire or contemporary works. Creating one show a year, she has built up, piece by piece, a body of work inspired by reality and the quest for transmission. 

At the helm of the Théâtre Gérard-Philipe, Julie Deliquet has established herself as someone who wants to forge links with other companies and directors. One of the major strands of her project is devoted to young people, with shows designed for all ages. She also puts support for creation and the prospect of its expansion at the heart of her initiative, while seeking to place women at the helm of major projects. 

Named an Officer of the Ordre des Arts et des Lettres in 2020, Julie Deliquet has adapted numerous authors for the stage, including Ingmar Bergman's Fanny et Alexandre at the Comédie-Française and Arnaud Desplechin's Un conte de Noël at the Théâtre de l'Odéon. In 2021, she also directed Rainer Werner Fassbinder's Huit heures ne font pas un jour (Eight Hours Don't Make a Day) at the TGP.

In July 2023, Julie Deliquet will open the Festival d'Avignon with Welfare, adapted from the documentary film by Frederick Wiseman. Set in the Cour d'Honneur of the Popes' Palace, it is a show that aims to capture the Human Comedy, and is being staged thanks to the Franco-American FACE fund. The play is also supported by the Cultural Services of the French Embassy in the USA and the Villa Albertine.