This, I have to say, feels as big as the William and Kate affair did seven years ago.
No it doesn't have the same constitutional implications, but that aspect has been replaced by the fact that Harry is most people's favourite royal and the woman he is to marry comes with a certain splash. They are a glamour couple.
And that is all good for business. And in that we must never forget what royalty is all about. The royals need relevancy, as they found out when Edward took over from Victoria. She had vanished for years and many wondered what the point of all of this was. Edward had worked that out and had a plan. And in many respects the family has never looked back.
There have, of course in recent times, been the dark years post-Diana. But with the young royals the entire operation has been rejuvenated and I think most agree the firm has never been in better shape and this weekend's wedding and the excitement around it shows exactly that.
And that's the sense of it all when you're on the ground in the middle of it all. For every doom merchant who speaks ill of royalty, you can't hide the reality.
You can't have as many documentaries, newspaper column inches, interviews and headlines as we have seen without knowing they are only there because of demand.