The Kuprins, while in emigration, faced financial difficulties. Therefore, when the couturier Paul Poiret offered the writer's daughter Ksenia, who was distinguished by her attractiveness and slenderness, a job as a model, she agreed without hesitation. She found it easy to work on the runway, but the difficulty lay in the fact that Ksenia could not always maintain a calm expression. At one of the shows, she was noticed by the famous film director Marcel Lherbier. At the age of 18, Ksenia, taking the pseudonym Kissa Kouprine, signed a contract and received her first role in the film "The Devil in the Heart," which immediately brought her fame. Soon she starred in five films in a row, working with actors such as Jean Marais and Jean Gabin.

To get an autograph from "Kissa the Actress," dozens of fans gathered outside the Kuprins' home. Her popularity soon overshadowed her father's fame. One day, a Russian émigré working as a taxi driver in Paris heard the Kuprin name from his passengers and asked, "Excuse me, are you not the father of the famous Kissa Kouprina?" Returning home, Alexander Ivanovich smiled and told his wife, "Now I am not a writer, but the father of a famous daughter!" Despite offers to go to Hollywood, she remained in France, working in theaters, including the legendary Comédie-Française. Newspapers wrote about the emergence of a new dazzling star.

After World War II, in the 1950s, Ksenia decided to return to the USSR. Her homeland met her indifferently, even though she brought a suitcase with her father's archive, including unpublished works. In the Pushkin Theater, she was given only episodic roles. The artistic director Boris Ravenstikh often insulted her, once asking, "What did your father write besides The Garnet Bracelet?" Ksenia Alexandrovna died in complete solitude and was buried next to her father at the Volkovo Cemetery in St. Petersburg.