Body Gossip invites everyone in the UK to send thoughts, opinions or stories that relate to body image in some way, and a selection of these are then turned into live theatre events and short films.
Teenagers from the Manor School in Arbury, Cambridge will also sing a song composed by Body Gossip ambassador Grace Barrett at the performance tomorrow (Wednesday, November 28).
Body Gossip's co-directors Ruth Rogers and Natasha Devon last month won the 'Best Campaigners' prize at the Cosmopolitan Ultimate Women of the Year Awards.
Devon said: "I am ridiculously proud of the students I have been working with. Teenagers in the UK are often given a bad reputation, but I have worked with 13,000 thousand of them as part of the Body Gossip education programme and I am yet to meet one I don't like.
[Body Gossip Ambassadors L->R Zaraah Abrahams, Ortis Deley, Cerrie Burnell and Louisa Lytton]
"I know William and Kate will love the students at The Manor. They are bright, engaged, talented and enthusiastic and pieces they have written truly reflect who they are.
"Body Gossip is a campaign which gives real people a voice and what better way to do that than to give young people the opportunity to describe their lives to the Royals?"
Barrett added: "It's so exciting to be performing this song we wrote together to the Duke and Duchess.
"The students came up with the subject matter for the lyrics and I helped them to shape it into a song. To have such a prestigious platform to showcase our work is incredible".
[L: Grace Barrett, R: Ruth and Natasha]
Rogers recently told Digital Spy: "If you write your story down, it's cathartic. It gets it out of your head on to a page.
"We've had so many people emailing us to say, 'I don't mind if this never gets turned into a play or turned into a film, I just feel so much better now I've said it and got it off my chest'."
She added: "Anyone who reads or watches one of those stories will realise that they're not alone."
Watch the 'Feel the Love for You' music video for Body Gossip, written and performed by Alfee, below: