I Love You, Daddy: The secret 35mm black-and-white film Louis C.K. shot over the summer

The Toronto International Film Festival revealed its full main slate, with one unusual surprise.

Louis C.K.'s I Love You, Daddy was an unexpected addition. The comedian secretly shot the film over the summer on 35mm, his first film as a director since 2001's Pootie Tang, which was decimated by critics on release.

The film tracks the relationship between Glen Topher (Louis C.K.), a successful television writer and producer, and his daughter China (Chloë Grace Moretz). Charlie Day, John Malkovich, Edie Falco, and Pamela Adlon also star.

It'll inevitably be hustling for attention amongst what's a pretty packed slate of potential goodies for this year. Brie Larson, for example, is bringing her directorial debut Unicorn Store to the festival, in which she plays a young woman who has to move back in with her parents, but begins to learn what it means to grow-up when she gets invited to the titular store.

Aaron Sorkin's directorial debut Molly's Game, starring Jessica Chastain and Idris Elba, could certainly become an Oscar-favourite with its story of a former Olympic skier who begins running a high-stakes poker game.

Already announced highlights include Alexander Payne's Downsizing, Darren Aronofsky's mother!, Guillermo del Toro's The Shape of the Water, and George Clooney's Surbicon.

See the full list of films on the TIFF website. The festival runs from 7 - 17 September.