But according to Hello, royalists will get a rare glimpse of Kate Middleton and Prince William's youngest on his first birthday on April 23.
The publication explained how, "The special milestone is expected to be a private family affair, but if it's anything like Prince George and Princess Charlotte's first birthdays, then Kate will take some portraits of Louis, which will be released by the palace."
Louis' last sighting was back in February, when a fan photographed the Duchess of Cambridge taking her little man for a walk in his pram.
Prior to that, he was photographed for the Royal Family's official Christmas portrait alongside his parents, brother Prince George, five, big sister Prince Charlotte, three, uncle Prince Harry and aunty Meghan, plus his grandparents, Prince Charles and Camilla.
Back in November, Kate revealed that Louis was "getting to be a big boy," then in January she commented, "Louis is a fast crawler."
Aww. He's all grown up!