Olive Rita Webb, later known as Olive Rita Thompson, was an English character actress, mainly in comedy roles. She was the eldest child of Henry Augustus Webb (1880–1926) and Rose Jeannette Keysor. She had a younger brother, Henry Richard Webb, also an actor, and two elder identical twin half-brothers, Leslie and Gordon Durlacher, from her mother's first marriage to Samuel Durlacher. She was the niece of Leonard Keysor, the first Jewish serviceman to win the Victoria Cross in the First World War. A half-brother was the actor George Webb.

Leonard Maurice Keysor, VC was a British-born Australian recipient of the Victoria Cross, the highest award for gallantry "in the face of the enemy" that can be awarded to British and Commonwealth forces. Born in England, Keysor emigrated to Australia shortly before the outbreak of the First World War. He enlisted in the First Australian Imperial Force in August 1914 and served in Egypt before landing at Gallipoli, Turkey at the beginning of the campaign. On 7 August 1915 at Lone Pine, while serving as an acting lance-corporal, 29-year-old Keysor performed an act of bravery for which he was awarded the Victoria Cross. Later in the war he took part in the fighting in France, serving in the trenches along the Western Front. He would later achieve the rank of lieutenant before being discharged from the army on medical grounds at the end of the war.