During a volunteer event with the Scouts association as part of the third day of coronation weekend festivities, Kate Middleton affectionately called her youngest child, Prince Louis, "Lou Bugs." The royals have previously shared sweet nicknames they use for their children, including Princess Charlotte being called "Lottie" by the Princess of Wales and William calling her "Mignonette."
The Princess of Wales revealed an affectionate nickname for her youngest son, Prince Louis, as the family participated in The Big Help Out to renovate a building in Slough. The children were encouraged to get involved and were seen painting, drilling, and filling a wheelbarrow with sand. Louis was praised for his hard work and enthusiasm, and his mother affectionately called him "Lou bug" and "poppet." The family also added their handprints to a mural and enjoyed toasting marshmallows. The event was part of a nationwide effort to mark the end of the King's Coronation and promote volunteering.