Prince Archie Harrison Mountbatten-Windsor, the son of Prince Harry and Meghan Markle, is about to celebrate his seventh birthday next week. He has already reached a significant royal milestone by accompanying his parents on a royal tour to South Africa in 2019 when he was just a few months old. In contrast, his cousin Prince Louis, who is eight years old, has yet to go on a royal tour, primarily due to travel restrictions during the COVID-19 pandemic and his mother Kate Middleton's cancer diagnosis in 2024. Archie's siblings, Prince George and Princess Charlotte, embarked on their first royal tours at even younger ages, with George traveling at nine months and Charlotte at 16 months. Meanwhile, Archie's sister, Princess Lilibet, who turns five next month, has not yet appeared at any royal events, having only met her grandfather, King Charles III, once. Archie, who was born on May 6, 2019, is currently sixth in line to the throne and moved to the United States with his family when he was 10 months old after his parents stepped down from their royal duties.