Major-General Gerald Cavendish Grosvenor, 6th Duke of Westminster, KG, CB, OBE, TD, DL (born 22 December 1951 in Omagh, County Tyrone, Northern Ireland), is the son of Robert George Grosvenor, 5th Duke of Westminster, and his wife Hon. Viola Maud Lyttelton. In 2005, he became Chancellor of the University of Chester. He was educated at Harrow School and Sandhurst. According to the Sunday Times Rich List 2009, The Duke of Westminster is worth £6.5 billion placing him 3rd in the list behind Roman Abramovich and Lakshmi Mittal.

Grosvenor is the richest property developer in Britain and one of Britain's largest landowners, owning vast estates in Lancashire, Cheshire and Scotland as well as great swathes of Mayfair and Belgravia in central London. Internationally the Duke also owns vast estates in Canada and Spain.

After leaving Harrow School with a single O-level, Grosvenor failed the entrance examination to the Royal Military Academy at Sandhurst. The Duke joined the Territorial Army in 1970 as a trooper.