A Therapy features Brits Sir Ben Kingsley and Helena Bonham Carter playing psychiatrist and client.
The Dark Shadows star is dressed head-to-toe in Prada finery in the arty film.
Polanski, Kingsley and Bonham Carter aren't the only revered movie names taking part in the Prada-sponsored film - Oscar winners Ronald Harwood and Alexandre Desplat provide the script and music, respectively.
Polanski tells Britain's Telegraph, "I had the opportunity to reunite my favourite group of people on set and just have fun... It's very refreshing to know that there are still places open to irony and wit and, for sure, Prada is one of them."