Margarita Armstrong-Jones

A young girl attended the wedding of the future William V and his wife which occurred during the reign of Elizabeth II. She waved to the crowd as they shared a kiss. (PROSE: The Secret Lives of Monsters)

Behind the scenes
Kate Middleton, Grace van Cutsem, Tom Pettifer William Lowther-Pinkerton, and Armstrong-Jones are pictured, but not named in a photograph of Middleton and William V's name in The Secret Lives of Monsters.