Queen Elizabeth II sends invites for Royal wedding

The video discusses the guest list for Prince William and Kate Middleton's wedding, highlighting the exclusion of heads of state like President Obama and President Sarkozy. The guest list includes family, friends, and members of the royal family, with a total of 1900 invitations. The wedding is not a state event, and notable guests may include celebrities like the Beckhams and Elton John. The reception will be more exclusive, with only 600 attending the afternoon event and 300 for the evening dinner.

What type of wedding is being described in the text?

What will happen to the guest list after the initial invitations are sent?