Nicole Coddington, a senior designer who worked on the phone, said HTC wanted to create a new visual language for the Rhyme.

FORBES: HTC: New Rhyme Phone Shows 'Not A One-Size-Fits-All' Company

Ms Bruni worked for several years as a super-model, earning accolades from British clothes designer John Galliano who described her in the film as being "like a silent movie actress with her body language - the dress is her script".

BBC: Carla Bruni opens up for French TV