Kate Middleton and Prince William weren't nervous on their wedding day—claims Archbishop of Canterbury who married the couple 10 years ago

Despite billions of people watching around the world Kate Middleton and Prince William weren't nervous at all on their wedding day—claims the Archbishop of Canterbury.

• The Archbishop spoke on last night's BBC documentary Royal Wedding: A Day to Remember—which takes a look back at the Duke and Duchess of Cambridge's wedding 10 years ago.
• It follows William and Kate's sweet family video released to celebrate their anniversary.
• This royal news comes after Prince Harry’s cheeky hilarious backup plan for if Kate rejected Prince William’s proposal was revealed. 

The majority of us would be nervous on our wedding day and even more so if the whole nation was watching - but according to the man who married them Kate and William were excited and calm.

"They didn't seem nervous," Ronan Williams said on the documentary. "Yes, as it happens, a couple billion people were watching, but they were still talking to one another, from the centre, where it matters."

While he went on to say he knew their marriage would go the distance: "They looked as if they were quite enjoying themselves. And when they are smiling at each other, I feel 'Yes, yes, it is working' and it did."

The documentary follows photos and a video that the royal couple released this week - to mark 10 years together. The anniversary photos of the two, which people believe are at their country home in Anmer Hall show the couple is sporting stunning blue outfits. 

The large blue sapphire engagement ring that Kate wears is also displayed prominently in the photo— and originally belonged to the late Princess of Wales.

Yesterday the couple also posted a sweet video with their children, Prince George, Princess Charlotte, and Prince Louis. In the clip, we see Will and Kate running and playing with their little ones on the beach and in the garden. 

"Thank you to everyone for the kind messages on our wedding anniversary," they captioned the video. "We are enormously grateful for the 10 years of support we have received in our lives as a family. W & C."