A baby quite ordinary in every other way, has no idea yet that he is going to have an extraordinary life. Heir to a monarchy that commands more of the world's attention than any other, his status is pre-ordained. Even celebrities normally have a private childhood. This one will not.
Yet it is the "normal" things that happen in the royal family that captivate us most. The royal birth has attracted the kind of warm interest that people feel for a baby born to a close relative. News of the pregnancy and signs of its progress made the baby's gender and possible name a matter of universal conversation, which intensified keenly as the birth became due.
We noticed that Prince William and Catherine were like any young expecting couple we know - a little awkward but blissfully excited. Prince Charles seemed as nonchalant as any man on the matter - until the baby arrived. Yesterday he expressed the special unexpected delight that every new grandfather discovers. And the Queen will be quietly astonished, like every great-grandmother, that life has let her see the first member of a new generation.
It is the genius of this royal family to be both public and private figures at once. They never court publicity and they are capable of ignoring it for the sake of some privacy. Typically in the past few weeks they felt no need to tell the world precisely when the baby was due, despite the rosters of news photographers camped outside the hospital and all the earnest knitting going on.