Kate Middleton, 32, has rarely been seen since the birth of second child Princess Charlotte in May, but Kensington Palace has confirmed she will visit the children's mental health charity on 17 September.
The Anna Freud Centre, based in London, is a clinical, educational and research institution specialising in the psychological treatment of children and young people.
Kate works closely with a number of organisations and charities providing help and assistance for young children. She is patron of East Anglia Children's Hospices and The Art Room, as well as working with Place2Be and the Scout Association.
The duchess was last seen in public in July, when she attended the America's Cup World Series sailing competition in Portsmouth, alongside husband Prince William.
She's been taking time out from royal duties in recent months to care for Charlotte and Prince George, who turned two in July.
The family have been based at Anmer Hall in Norfolk, rather than Kensington Palace in London, as Kate and William want to raise their children away from the spotlight.
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