From his infant trip to Australia with his mother to his graduation from St. Andrews University, William's life was filled with photo ops.
"We have a paradox here. William loathes the press and exposure to the publicity. On the other hand, Diana exposed both sons at an early age. They are immensely assured young men," Lacey said. "While he may want to keep his children out the limelight, as a modern monarch he knows he has to deal with the media."
Now, the name guessing game begins.
"They'll stick to traditional names," Lacey predicts. "William has a great sense of history from working with his grandmother. The queen would have him over for tea to teach him about history and the workings of the monarchy."
It's typical for royals to have three or four names. Prince William's full name is William Arthur Philip Louis.
"If it's a girl it's not likely to be called Diana," Lacey said. "But you're very likely to see Diana in one of the middle names. You might very likely get Elizabeth Diana something. It shows the bravery with which he's kept his mother's memory alive, right down to the ring on Kate's finger."