Karl Lagerfeld and Rachel Bilson at Magnum Short Films Screening

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Rachel Bilson and Karl Lagerfeld at the screening of Magnum short films.

Rachel Bilson stars in an unconventional series of short films that débuted at the Tribeca Film Festival in New York on April 21. The three films, directed by Karl Lagerfeld, were made to introduce the Magnum brand of ice cream in the U.S.

In the films, titled Photo Mood (watch below), Art Class, and Applause, the pint-size actress plays a famous model, an art student, and a ballerina, respectively, all of whom find satisfaction in an ice cream bar. Who can’t relate to that?

At the screening, Bilson, in a pink embroidered Chanel Haute Couture dress from the Spring/Summer 2010 collection, said she jumped at the chance when Magnum approached her for the project. “Karl was involved, so it didn’t take much,” she told FashionEtc, laughing.

Working with Lagerfeld was a once-in-a-lifetime experience, Bilson said. And coming to work was a pleasure, with the Kaiser’s handsome muse Baptiste Giabiconi as co-star and all the frozen treats she could eat.

“I ate a lot of ice cream, I’m not going to lie,” she said. “But it’s really good, so it wasn’t a hard job.”

Anna Wintour escorted Lagerfeld to the premiere at the IAC Building in Chelsea, and guests included Elletra Wiedemann, May Anderson, Behati Prinsloo, Crystal Renn, Christian Siriano, and Patrick Demarchelier.

The films will be rolled out on the Magnum Web site over the next three weeks.