Sir Michael Charles Gerrard Peat GCVO FCA (born 16 November 1949) is an English retired accountant and courtier.
He was the Principal Private Secretary to King Charles III and Queen Camilla between 2002 and 2011 when they were Prince of Wales and Duchess of Cornwall.
In 1990, he was appointed Director of Finance and Property Services of the Royal Household, while remaining a partner at KPMG.
He retired from KPMG in 1993, and in 1996 was appointed Keeper of the Privy Purse and Treasurer to the Queen and Receiver General of the Duchy of Lancaster.
He continued to undertake investment and financial projects for the Prince and provide advice on a part-time basis.