Katia Leclerc O'Wallis was born in Paris. She took part as an actress in theatrical performances and films in France, working with directors such as Pauline Bureau, Adrien de Van (Avignon Festival In), Florian Sitbon, Ali Ihsan Kaleci. In Portugal she appeared in the feature film Gloria by Manuela Viegas, in the Czech Republic she sang in German in the Cabaret Gogo by Michal Laznovsky, in England she joined the theatrical tour The three Musketeers, in Italy she worked with the Workcenter of Jerzy Grotowski and Thomas Richards, in Turkey she played in Sufi performances at the festival The Nights of Cappadocia.

Since 2009 she has been working in Athens, playing in Greek, French and English in the cinema and theater. She had the leading roles in the feature films Charlie’s son, Big Hit and Pedro Noula by Karolos Zonaras, and Back held hands by Nikos Kornilios.