Rachel Bilson Karl Lagerfeld on set Magnum short film.jpg

We are used to seeing Karl Lagerfeld behind the camera filming and photographing high-end fashion films and campaigns. But it seems he is just as happy to get involved in more commercial projects, such as this one for Magnum ice cream. The Chanel designer has teamed up with the brand to create a short film captured on location in Paris. Starring Rachel Bilson, the film was shot last month and is quite clearly inspired by Natalie Portman in The Black Swan.

"I don't even know how to describe what it's like working with such a fashion icon like Karl," Rachel says of the designer. "The fact that he has headed Chanel for 20-something years, he's just incredible, and I am just in awe of him."

Check out the pair as they work together in a behind-the-scenes video after the jump...