PRINCE George, 4 and Princess Charlotte, 2, could look on the Lindo Wing to meet their newest siblings whose Cambridges maintain a royal tradition.
In 2015, the Duke of Cambridge Prince William Prince George bought to the hospital to meet her new sister, Princess Charlotte, when she was born in May.
The 21 month old was dressed in blue and nervous wave to crowds waiting outside the hospital for a moment that delighted royal monitors around the world.
The young prince followed his father's footsteps who had done the same trip with her nanny 30 years earlier to meet her new brother, Prince Harry, on September 16, 1984.
British media at that time reported how Prince William, dressed in red shorts, a white shirt with red embroidery, white ankle boots and traditional leather shoes, ran down the corridor in Diana's arms, which she called his name.
He was said to be "very excited to see his new brother" and held his hand while lying in the cot before being taken home by his nanny.
This introduction could prove more difficult, however, because there are two roya. I have headed the Cambridge head on the stairs outside the wing and show the new baby to the world's press that is gathered over the road.
The birth comes at a time when the royal family drives a wave of popularity after the Queen's 92th birthday and the upcoming wedding by Prince Harry and Meghan Markle.