The Duchess of Cambridge is coming to Lambeth on Shrove Tuesday (28 February) to visit the new accommodation for families of patients at the Evelina London Children's Hospital.
News of the royal visit has been revealed on the Buckingham Palace website.
The 59-bedroom Ronald McDonald House Evelina London opened in December next to Lambeth Palace.
The new accommodation replaced the previous Ronald McDonald House near Guy's Hospital, which meant that families had a long journey to visit their loved ones at the Evelina which is on the St Thomas' Hospital campus.
The new £13 million house has been built and will be run by Ronald McDonald House Charities. Money for Ronald McDonald House Charities is collected at McDonald's restaurants around the UK and beyond.
The project is being run in partnership with Guy's and St Thomas' NHS Foundation Trust, which made a significant contribution to the cost of the build, and Guy's and St Thomas' Charity, which provided the land and helped to bring the parties together.
The site of the new Ronald McDonald House was previously occupied by a King's College London student residence called Brian Creamer House.