Holly Willoughby has become a brand ambassador for Marks & Spencer.

The 37-year-old TV presenter has joined forces with the British high street retailer and is set to unveil her 20-piece autumn edit called 'Holly's Must-Haves' which will launch on September 27.

Sharing her news on Instagram, Holly wrote: ''Got some Monday morning news to share with you ... @marksandspencerhave always been part of my family and now they have asked me to be part of theirs.

''Super proud to be a M&S brand ambassador, my edit will be available online and in selected stores on the 27th of September... follow @marksandspencer on Instagram for more info. (sic)''

Holly is a huge advocate of high street shopping and is a long-time fan of the brand and she is often seen sporting clothing from the retailer when she hosts 'This Morning' alongside Phillip Schofield.

M&S confirmed Holly's role with a post the company's official Instagram account which read: ''We're so excited to finally be able to share with you that @HollyWilloughby has joined M&S as our newest Brand Ambassador, with her first 20 piece Autumn edit 'Holly's Must-Haves' launching on the 27th of September.

''As a long standing fan of the brand (and owner of one of the best wardrobes around!) it's the perfect pairing and we can't wait to share more info with you soon. #HollysMustHaves (sic)''

Holly's collaboration with M&S is not the only new job she has picked up in the past few weeks.

She was recently confirmed to be hosting this year's series of 'I'm A Celebrity... Get Me Out Of Here!' with Declan Donnelly.

Holly is filling in for Dec's usual presenting partner and her friend Ant Mcpartlin who is having a year off following his treatment in rehab for substance abuse issues.

She said: ''I couldn't be more excited to have been asked to stand alongside Dec for the next jungle adventure. I love Ant and want to send him my best wishes and support for a continued recovery.''