The foundation, which was founded in 2009, was set up by the two princes, William and Harry, anxious to perpetuate the work of their mother, Princess Diana, who was active in many charities.
Kate Middleton, 29, was growing near the foundation since she married the Duke of Cambridge, in April.
The foundation should also soon change its name to include the presence of the Duchess.
Prince William said the decision to the Daily Express: “We believe that this will be a unique opportunity for us to use our privileged positions to make a difference in the future. ”
He added: “We feel passionate about this. Working together in the foundation will allow us to make a tangible difference in the long term. “