The split sparked rumours of a rift between the Cambridges and Sussexes (who were once dubbed the Fab Four).
Kensington Palace released a statement confirming the news in June.
"The Royal Foundation of The Duke and Duchess of Cambridge and The Duke and Duchess of Sussex has today announced the conclusions of a review into its structure, and how it will best support Their Royal Highnesses with future charitable activity," the statement said. "Later this year The Royal Foundation will become the principal charitable and philanthropic vehicle for The Duke and Duchess of Cambridge. The Duke and Duchess of Sussex will establish their own new charitable foundation with transitional operating support from The Royal Foundation."
"The statement also revealed that while the royal foursome will not work together within the charity that was founded by the two royal brothers and Kate Middleton, they plan to "work together on projects in the future, including on The Foundation’s mental health program, Heads Together."
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The statement also discussed the Duke and Duchess of Cambridge’s future charitable efforts.
"The Duke and Duchess of Cambridge wish to build on The Foundation’s past successes, continuing programs such as 'Heads Up,' the new mental health campaign delivered in partnership with the FA, 'United for Wildlife,' which runs a global taskforce tackling the illegal wildlife trade, and 'Mentally Healthy Schools,' which supports teachers and staff improve child mental health. They are also developing new initiatives on the environment and support for children and families which The Foundation expects to announce in the coming year."