Melville Richard John Guest OBE (born 18 November 1943) is a British former diplomat and first-class cricketer. He was born in what was then Salisbury, Southern Rhodesia, two weeks after the death of his father, Ernest Melville Charles Guest, a RAF pilot who was killed in action over the English Channel. He was educated at Rugby School and Magdalen College, Oxford, where he played cricket for the University from 1964–1966 and earned a Blue. In the Varsity Match of 1965, Guest and his fellow batsman Mike Groves were barracked by the crowd for slow scoring, with 15 consecutive maiden overs bowled by the two Cambridge spinners. He was elected President of Vincent's Club in 1966.