Mary Killen is a Northern Irish etiquette expert who writes an "agony" column for The Spectator. She is also the author of several books, and formerly worked in the Ministry of Defence. Mary was brought up in Larne, Northern Ireland. She attended Larne Grammar School from September 1963 until June 1970. Killen lives in Wiltshire, England, and is married to artist Giles Wood. They met when Giles was studying at Wimbledon Art School, and Mary was a model. Mary was formerly the face of Heinz Soup in a 1970s advertisement campaign Mary and Giles have two children.