Lowther-Pinkerton began as an equerry to Queen Elizabeth, the Queen Mother, then became principal private secretary to Princes William and Harry from 2005 to 2013, a span that covered William's courtship and the April 2011 wedding.
Now Deputy Lieutenant of Suffolk, he recalls blushing when Princess Kate kissed him during a 2025 visit. Still close to the family, he is a godfather to Prince George, helped keep Harry low-profile on tours, says he tried to secure William's service abroad but was blocked by security, and remains reluctant to discuss the brothers' rift while insisting he is fond of Harry.