So far, only Wills has been spotted visiting the Duchess of Cambridge, with the Duke seen at the hospital every day since she was taken ill.
P-Middy and James were snapped leaving the hospital yesterday, with Pippa wearing a beige belted trench coat - hiding her famous bottom - and completing her look with knee-high tan boots.
Pippa's visit comes after it was alleged that she stands a good chance of being named as a godparent for Kate and Wills bundle of joy, withPrince Harry also expected to be given the role.
Joe Little, managing editor of the Majesty royal magazine, told the MailOnline: “I think Harry and Pippa are very likely. As you know most people have just one or two godparents. But in royal circles you have a lot more, certainly William had quite a team."
“I rather think they won't have quite so many - perhaps four. Harry would take care of the royal connection and Pippa would take care of the Middleton side. There are few options amongst their close friends. The van Cutsems and the van Straubenzees certainly."
The Royal expert continued: "William is a godfather of several children, one of whom was Grace van Custem, the little bridesmaid covering her ears on the balcony on their wedding day. Quite possibly the favour will be returned to them.
"I would say Harry and Pippa, a Van Cutsem, and maybe one of Kate's close chums from school and that might be it. Whoever it is it would have been given careful consideration. It would be a huge honour to be the godparent of a future King or Queen.”