Pharrell Williams launching Cara Delevingne's music

Pharrell Williams is reportedly helping British model Cara Delevingne branch into the singing business.

The Happy hitmaker has reportedly been working on material for the past eight months and will release a duet to kickstart the catwalk beauty's music career under his 'i am OTHER' record label.

A source tells British newspaper The Sun, "They're going to release the song without warning, complete with video and global launch... they seem to have formed a great little writing collective and apparently it's a huge song."

Delevingne was spotted with Williams in Paris, France recently and it is thought the pair was recording a music video.

The model also made a brief appearance onstage during his concert in the French capital this week (begs13Oct14) by dancing in the background as he performed Happy.