'Wedding of the Century' sneak peek: 'She was always charming'

An exclusive clip from the new Royal Wedding documentary, 'Wedding of the Century'

Video Transcript

- She was so easy to deal with. She wasn't particularly demanding. She was always charming.

- However, Diana did have one particular request for David.

[CROWD CHEERING]

- If you look at the photographs of Princess Elizabeth's wedding, you'll see that the big photograph with all the bridesmaids, everyone is carrying a bouquet except the bride. And the story was that the Princess asked for her bouquet to be put on the Tomb of the Unknown Warriors.

Lady Diana, she's heard this story. So she said please, can we have two bouquets. So they had one, which went straight on to the tomb, and the other one, which I delivered to Buckingham Palace, was ready for the photographs. It was a great deal of secrecy.

The press get hold of it, and as soon as they know, they want to interview and talk about it. And what they're going to do, what the design's going to be. And of course, those things are a secret until the bride walks into the church.