The song Oscar-winning French actress Marion Cotillard has teamed up with Franz Ferdinand to record a song to launch Dior's new fashion range.

Cotillard, the face of the French label, sings lead vocal on 'The Eyes Of Mars', written by the band. It can be heard online now.

The song will soundtrack an advert in which Cotillard plays a working woman who transforms herself into a sultry singer at night. She emerges from behind a velvet curtain in a club to sing the song.

The advertisement, shot in New York in 2009, is the latest instalment in a series of online ads built around the iconic Lady Dior handbag.

Cotillard won an Oscar in 2008 for her role as singer Edith Piaf in the biopic 'La Vie en Rose'.