But there were moments you were not meant to hear, ranging from intimate comments from guests as they arrived to the obvious nervousness of Prince Harry.
Sky News employed a lip-reading expert to capture a few of the moments that could not be heard as millions watched around the world.
On arriving at the church, Tom Parker Bowles revealed more than he would probably like anyone to hear when he told a blonde woman he was walking beside: “I’m not hungover today so that’s really good.”
Singer Joss Stone was obviously thinking about how she would cope after the long day and night ahead when she said to a female companion: “I can sleep on the way home.”
Harry’s nervousness came through during his conversations with his brother Prince William as they made their way to the church.
While Harry and William were walking, Harry said: “This is as far as we can go.”
Then there was his concern over where Meghan was at this stage. Realising he was now minutes from the biggest day of his life, he said to William: “Is she here?”
The Duke of Cambridge: “No, not yet.”
There was clear emotional gratitude towards Prince Charles from Harry as they exchanged glances in the church and Harry said: “Thanks, Pa.”
Once the ceremony was over and the couple were finally together in the carriage, Meghan put her hand to her chest and said to Harry: “So much fun.”
On a day of huge excitement, a body language expert said Meghan “was the strength” of her wedding ceremony as she appeared to be constantly reassuring Harry.
Although the experience was completely new for Meghan, who became the Duchess of Sussex, she displayed no signs of anxiety or nervousness.
That was in contrast to her new husband, the Duke of Sussex, whose body language suggested he was “was so patently nervous”.
Body language expert Judi James said Harry performed about 12 self-touching body checks, including pulling at his gloves and wringing his hands, just before getting out his car after arriving at St George’s Chapel in Windsor.
Meghan, however, maintained complete calm throughout the ceremony to “help Harry through it”.
Ms James said: “Meghan was amazing. Walking up the aisle by herself, I looked for every smallest sign of suppressed anxiety and nervousness – there was absolutely nothing.
“I think she probably saw it as her role to help Harry through it rather than the other way round. She sat with her hand over his for quite a bit of the service as though she was reassuring him.
“To me, she was the strength when it came to the day and the actual performance.”
Ms James said Meghan’s hand was “like a ballet dancer’s” during the exchanging of their vows, as it was incredibly steady.
She said the Duchess’s gaze was also a sign of her confidence in leading the day.
“For me, today was something we don’t usually get at royal weddings, which is the eye gazing between the couple because she gave Harry a 100% eye gaze.
“When he went to take his vows, the undistilled awe and love for her is what we normally see at royal weddings in very tiny glances – but we got the full force of it with this one, which is what made it unique and very touching.”
After entering the chapel with his brother Prince William there were several signs that Harry was becoming increasingly nervous as he began touching his face, blinking more and licking his lips.
Ms James said: “It was quite unusual and sweet to see him in that mode because normally at royal events he is the joker in the pack and making everybody else laugh.”
“But this one had knocked him sideways a little, probably more than he was expecting,” she added.
The rest of the Royal Family, especially through the colourful sermon delivered by American minister Michael Curry, were calm.
She said: “It clearly would have been a first for most the royals, who weren’t expecting it.
“Camilla went from smiling and laughing in the right places to thumbing through the programme like she did at the Commonwealth Games. I don’t think she was quite sure how to take it.
“Even Harry did a slight finger tap, which could be a suppressed sign of impatience. He and Meghan kept catching one another’s eyes through it.”
Chelsy Davy, Prince Harry’s ex-girlfriend was noticeable by her body language, Ms James said.
“She was the spectre at the banquet.
“When she arrived, everyone else was chatting and laughing, but she sat in the pews just looking to one side – gazing reflectively into space and biting her lips slightly.
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“She was doing that at the end as well. It was almost the soap opera part of the ceremony.”
:: See all of the guests as they arrived at the royal wedding – use our exclusive, interactive Who’s Who feature on the Sky News app and website.