Joined the Comédie-Française on the 14th of June 2001. Became the 518th sociétaire on the 1st of January 2009

Julie Sicard began participating in theatre at the age of 13, with Les Agités, an acting company in Poitiers.
Under the guidance of Jean-Pierre Berthomier and Philippe Faure, she played in Wedekind’s The Awakening of Spring, Molière’s Amphitryon, Büchner’s Leonce and Lena and Ariane Mnouchkine’s 1789. In 1992, she played her first professional role in Laird Koenig’s The Little Girl Who Lives Down the Lane by, a production shown first in Poitiers and rerun at the Festival d'Avignon.
Julie Sicard trained at the Conservatoire national supérieur d'art dramatique with Jacques Lassalle and Catherine Hiegel. In 1997, she joined the Comédie-Française as student intern and was cast in La Tête dans les nuages by Marc Delaruelle.

She became pensionnaire on the 14th of June 2001, and the 518th sociétaire on the 1st of January 2009. She made her debut as Angélique in Molière’s Imaginary Invalid (Malade imaginaire) directed by Claude Stratz. As part of the Company, she has worked with the following directors: Thierry Hancisse in Molière’s Sganarelle ou le Cocu imaginaire and Cabaret Georges Brassens; Jacques Lassalle in Molière’s Dom Juan or the Feast with the Statue (Dom Juan ou le Festin de pierre) and Goldoni’s Il Campiello; Lukas Hemleb in Feydeau’s Le Dindon; Robert Wilson in La Fontaine’s Fables; Muriel Mayette-Holtz in Shakespeare’s A Winter’s Tale and A Midsummer Night’s Dream as well as Koltès’ Le Retour au désert; Oskaras Koršunovas in Shakespeare’s The Taming of the Shrew; Michel Raskine in Jean-Luc Lagarce’s Juste la fin du monde; Denis Podalydès in Rostand’s Cyrano de Bergerac; Galin Stoev in Corneille’s L'Illusion comique; TG Stan, De Koe & Discordia in Paroles, pas de rôles/vaudeville by Schrijver, Van den Eede, Koning; Lilo Baur in Gogol’s The Wedding; Philippe Meyer in Chansons des jours avec et chansons des jours sans and Nos plus belles chansons; Jean-Pierre Vincent in Molière’s Dom Juan or the Feast with the Statue (Dom Juan ou le Festin de pierre) and Labiche’s La Dame aux jambes d'azur; Robert Cantarella in Philippe Minyana’s La Maison des morts; Denis Marleau in Seneca’s Agamemnon; Anne-Laure Liégeois in Naomi Wallace’s One Flea Spare; Emmanuel Daumas in Voltaire’s Candide; Sulayman Al-Bassam in Saadallah Wannous’ Rituals of Signs and Transformations (Rituel pour une métamorphose); Zabou Breitman in Feydeau’s Le Système Ribadier and Giorgio Barberio Corsetti in Labiche’s An Italian Straw Hat (Un chapeau de paille d'Italie). In 2012, Thomas Quillardet asked Julie Sicard to play Petit cochon in his play Les Trois petits cochons. In 2016, she was cast as Elena Ivanovna Popova in Chekhov’s Swan Song and the Bear directed by Maëlle Poésy. She also sang in Cabaret Léo Ferré by Claude Mathieu. Anne Kessler entrusted her with the role of Grisette in Schnitzler’s La Ronde, while Christiane Jatahy saw her as Lisette in her adaptation of Jean Renoir’s The Rules of the Game (La Règle du jeu).

In 2017, Julie Sicard filmed with directors Laurent Perreau in The Odd Girl (La Bête curieuse) and Guillaume Gallienne in Maryline. She also appeared in original features created after Comédie-Française productions, such as Juste la fin du monde, which was adapted and directed by Olivier Ducastel and Jacques Martineau, L'Illusion comique by Mathieu Amalric, as well as Dom Juan & Sganarelle by Vincent Macaigne.

During the 2018/2019 season, Julie Sicard plays in Marivaux’s L’Heureux stratagème directed by Emmanuel Daumas and in Ingmar Bergman’s Fanny and Alexandre directed by Julie Deliquet.
Her public reading session, Grenier des acteurs, is dedicated to Véronique Olmi.