Fionn Whitehead: Fionn Whitehead. Actor: Dunkirk. From a family of Londoners, Fionn Whitehead was born and raised in Richmond upon Thames, Surrey (southwest England and also one of the home counties bordering Greater London). He is the son of Tim and Linda Whitehead, and has three older siblings: sisters Maisie and Hattie, and brother Sonny. Maisie, the eldest of the four, is a dancer and an Aerialist-Yoga enthusiast, while Hattie is a...