Kate Middleton has asked Prince Edward's seven-year-old daughter to accompany her down the aisle as bridesmaid on April 29.
Louise is said to be "so excited" at the invitation, and is eagerly anticipating the big day.
Others to make the cut are Viscount Linley's eight-year-old daugher Margarita and friends Rose Astor and Hugh Van Custem's three-year-old daughter Grace.
Kate's 26-year-old sister Pippa will be the maid of honour.
Photo: © Rex