Karl Lagerfeld has just unveiled more details about his forthcoming Chanel film starring Pharrell Williams and Cara Delevingne, which is due to premiere at the Métiers d’art collection in Salzburg next week. Just as we predicted, the video will feature a new song written by Pharrell, which the pair sing as a duet. The title? "CC the World".  

The film is titled Reincarnation and retraces the history of the iconic Chanel jacket. While holidaying in Austria, Gabrielle Chanel (played by Geraldine Chaplin) is inspired by the jacket worn by her hotel's elevator operator (Pharrell Williams). In an extended dream sequence, Pharrell is reincarnated as Franz Joseph I, the Emperor of Austria, while Delevingne plays his wife, Empress Elisabeth "Sisi" of Austria. Cue an imperial waltz, with a Pharrell-soundtracked twist. 

Lagerfeld said that he had sent the "Happy" musician "all kinds of Viennese music" to inspire the new track. "He was easy to work with, very pleasant. He’s very professional," Lagerfeld told WWD. 

He also said that Delevingne, who has just landed her first Hollywood acting role, had "wanted to sing for a long time". "For her to start singing with Pharrell is not that bad, no?" Lagerfeld quipped.

For her part, Delevingne says that she was ecstatic to be called up by Pharrell. "I was so happy, I think I screamed down the phone at him."

Other members of the cast include Lady Amanda Harlech, who appeared in Lagerfeld's last pre-collection film Private View, models Baptiste Giabiconi and Heidi Mount and six-year-old Hudson Kroenig, who will return to the Chanel catwalk at the Métiers d’art show. 

You can watch a preview of Reincarnation below: