The Twilight star has appeared in campaigns for the designer and she has recently wrapped her role as an actress impersonating founder Gabrielle Chanel as a young woman.

The film, which also features Geraldine Chaplin who has played Chanel in previous Lagerfeld films, was shot at director Luc Besson's Paris studio last month (Jul15).

Praising his leading lady's performance, Lagerfeld says, "She (Stewart) played it really, really mean.

"You only see her in tests and she's complaining about everything. She's mean with the director; mean with the producer."

The short will premiere during the French label's Metiers d'Arts show in December (15) in Rome, Italy.