Kensington Palace took to Twitter today (15 January) to announce The Duchess of Cambridge will be guest-editing the UK arm of The Huffington Post for a day in mid-February.
Kate Middleton will use her run as editor to bring the issue of children's mental health to the fore, commissioning content from parents, teachers, researchers and mental health professionals around the country.
A Kensington Palace Spokesperson said: "The Duchess of Cambridge has made the mental health of young children a key focus of her work in recent years. She is delighted that The Huffington Post will help put a spotlight on this important issue.
"The Duchess will be commissioning contributions from a number of leading figures in the mental health sector as well as from young people, parents, and teachers. We look forward to welcoming The Huffington Post team to Kensington Palace next month."
Stephen Hull, editor-in-chief of The Huffington Post UK, said: "We are thrilled that The Duchess of Cambridge is joining the HuffPost UK team for a day as a guest editor. Dealing with mental health issues has been a major editorial focus for us and I'm very excited to be working together on such an important project."