Royal Wedding Watchers are crowding around Westminister Abbey… and most would kill for an invite to friday's ceremony.
Tourist, Joyce Sherwood, "Oh...can you imagine? what would I wear, who would my date be?"
Charity worker anne chalmer can't believe she'll be rubbing elbows with the royal cream of the crop.
Anne Chalmer an Invited Guest says, "I'm very excited about going, it feels quite surreal really."
To avoid any embarrassment-- palace officials sent guests 22 pages of royal do's and donts.
Sarah Haywood is an Etiquette Expert and she says, "If you're lucky enough to be introduced to her majesty don't speak to her until she speaks to you. The first time you address her you must call her your majesty… "
Getting invited is only the beginning…like the bride-- guests want to look their best and no one wants to reveal what they'll be wearing on the big day.
The golden invitation is very clear about what the men should wear…a dress uniform, morning coat, or lounge suit.
Ladies are supposed to know better -no cleavage, no crèam or white, no sleeveless gowns...
And don't forget the hat….British designer Caroline Castigliano says the guests she's dressing are going for formal with flair.
But the royal rules won't apply once the lunchtime reception is over.
Designer Caroline Castigliano says, "The young girls going in the evening to the party are going glamorous - they want to make that red carpet look."
When a shorter list of v-i-ps will let their hair down with the future king and queen.