Aitken was born in Dublin, Ireland, the daughter of Sir William Aitken, a Conservative MP, and Penelope Aitken, whose father was John Maffey, 1st Baron Rugby. Her grandfather was the UK Representative to Ireland (1939–49). She is a great-niece of newspaper magnate and war-time minister Lord Beaverbrook, and sister to former Conservative cabinet minister Jonathan Aitken. She attended Riddlesworth Hall Preparatory School in Norfolk, Sherborne School for Girls in Dorset and St A…
