Harry and Meghan still haven't replied to the invitation to the coronation even though the RSPV deadline has passed. If it's true I think it's a bit rude. They know the preparation that goes into these events. It must be a headache for the planners not to know if they are coming or not.
Apparently Arche and Lilibet aren't invited to the actual ceremony as they are deemed to be too young. My bet is they will all come to the UK for the coronation but who knows. Not heard if Andrew is coming or not. And Fergie. Will she be there. Maybe behind a pillar.