À 14 ans, Alexandra Gentil, née le 9 novembre 1991, monte à Paris pour rejoindre le cours Florent.
La chance lui sourit puisqu’elle est très vite repérée pour le rôle de Tiphaine Bouley dans la série télévisée "Fais pas ci, fais pas ça", diffusée sur France 2.
Coup d’envoi de sa carrière d’actrice, la série affiche une très belle audience.
La télévision lui réitère sa confiance dès 2007, à l’occasion du tournage du polar "Duel en ville".
La jeune actrice y retrouve le réalisateur de "Fais pas ci, fais pas ça", Pascal Chaumeil, et joue aux côtés de Patrick Chesnais et Xavier Beauvois.
Loin de s’arrêter en si bon chemin, Alexandra Gentil flirte une première fois avec le cinéma en 2008.
Elle décroche un rôle dans le film dramatique "Joueuse" de Catherine Bottaro, où elle côtoie entre autres la comédienne Sandrine Bonnaire.
En 2011, Alexandra Gentil participe avec Lou Doillon et Aurélien Wiik à l’adaptation télévisée de la célèbre bande dessinée "L’Épervier " réalisée par Stéphane Clavier.
En 2009, l’actrice se lance un nouveau défi, le théâtre, à l’occasion de la pièce "Vie privée", mise en scène par Pierre Laville.
Marie-Line is juggling between odd jobs to support her agoraphobic father. Despite the precariousness of their lifestyle, she remains a lively and cheerful young woman. Yet, after a series of unfortunate events, she is fired from her job and sentenced by a judge to a small penalty. A few days later, this very judge will be in a position to help her get back on track – a chance for Marie-Line but also the beginning of an unlikely friendship.
After a drunken evening and an unforgettable night with a total stranger, Manu wakes up alone to find a message on his arm giving him an appointment in Avignon. Convinced that the appointment is with the dreamy woman from the night before, he is ready to do anything to find her again.
Kelly, Dan and Louis are students at a prestigious business school, destined to become tomorrow's elite. The industrious trio are determined to start putting their education into practise from the off in an attempt to make as much money as they can from their fellow students. Working on the theory that relationships between the sexes can be regulated by market principles, they begin to inflate the popularity of certain individuals artificially, by hiring beautiful and sexy off-campus women as their dates for exclusive and riotous college parties. However their perfect business model soon spirals out of control as their moneymaking scheme takes off in a big way across campus.
Hélène, a housekeeper at a ritzy hotel in Corsica, is devoted to her family but lacks any passion in her own life. When she sees a handsome couple play a passionate game of chess, she becomes inspired to play herself. Hélène's working-class husband and spoiled daughter are soon bewildered by her obsession with chess. They also grow suspicious of Hélène's close relationship with Dr. Kröger, her eccentric American expat tutor.