Despite Grantham's marriage to the sister of one of the most notorious participants in the 1715 Jacobite rising, George I appointed him Lord Chamberlain to the household of Caroline, Princess of Wales in 1717, and Grantham retained his position when the Prince of Wales succeeded as King George II in 1727 and the Princess became Queen Caroline.
Despite Grantham's marriage to the sister of a key figure in the 1715 Jacobite rebellion, George I appointed him Lord Chamberlain for the household of Caroline, Princess of Wales in 1717, and Grantham retained his position when the Prince became King George II in 1727 and the Princess became Queen.