Kostis Theodosopoulos studied at the Department of Communication, Media and Culture of the Panteion University of Social and Political Sciences. He has held positions coordinating masterclasses and open discussions at the Thessaloniki International Film Festival while, since 2010, he has been serving as program coordinator for the Athens International Film Festival and the Athens Open Air Film Festival, in parallel with pursuing further studies in the fields of cinema and directing. His debut short film, Rouge, had its International premiere during the International Film Festival Rotterdam 2020 and its North American premiere in Palm Springs ShortFest 2020. In addition, Rouge won 3 prizes (Best Newcomer Director, Best Screenplay, Best Make-Up) at the Drama International Short Film Festival, where it was selected for the National Competition section.