Christian Lamb (born 1920; née Oldham) is a British World War II veteran who helped to plan the D-Day landings in Normandy. She is a lecturer on the history of plants and the author of five books, including her war-time memoir, Beyond the Sea. As of 2022, at the age of 102, she is one of the last surviving officers of the Wrens, the Women's Royal Naval Service, to have served throughout the war.