They were in Paris when World War II was declared and fled to Périgueux, then Lisbon, arriving in Montreal in August 1941.

[1][6] She portrayed more than a hundred roles on the stage,[7] frequently including the classical (Euripides, Corneille, Racine, Molière, Musset, Marivaux, Beaumarchais, Chekhov), contemporary (Cocteau, Arrabal, Bernhardt), and Québécoise repertoires (Marcel Dubé, Réjean Ducharme, Jovette Marchessault, Michel Garneau [fr], Évelyne de la Chenelière).

[1] In the cinema, Bégin acted under the direction of Jean-Claude Lord (Délivrez-nous du mal, Panique), Denys Arcand (Stardom), Bernard Émond (Contre toute espérance), Ghyslaine Côté (Le Secret de ma mère) and Denis Côté (Elle veut le chaos).

[8] She embodied the disturbing character of Mademoiselle in Pascal Laugier's genre film Martyrs.

[9] As a theater instructor at Collège Lionel-Groulx for over 20 years,[3] she helped train a generation of young actors.