All the Celebrity Sightings at the Royal Wedding

Though he says the wedding made him feel "proud to be British," there was one thing he could have done without.

James Corden was back in L.A. after a whirlwind trip to London for Prince Harry and Meghan Markle's wedding and spilled some of the royal-tea on "The Late Late Show" last night.

The host was one of the many celebrity guests who attended the over-the-top affair and while he praised the ceremony, he was spotted during the live telecast looking absolutely miserable to be there (inset above). He addressed his appearance on Monday, explaining what was going through his mind when cameras cut to him at that moment.

"I've had quite the weekend. I really have. We did the show on Thursday, my wife and I flew to London, we arrived on Friday and Saturday we had the absolute honor of being invited to Prince Harry and Meghan Markle's wedding," he told his audience. "It was so lovely, I've known Prince Harry about 7 years now and it was wonderful. It was one of the most beautiful ceremonies I've ever been to. It was gorgeous, the whole affair was happy, it was joyous, it was uplifting."

Regarding his blank face, he said, "In my defense, what face do you make whilst you're watching a cellist in a church? People were like, 'Why are you so grumpy?' What do you want me to do?"

"It was Britain at its finest," he continued. "It was a picture perfect day. Elton [John] was there, he performed some songs in the afternoon, it was beautiful. George Clooney was there, so congratulations to Meghan and Harry on your brand new Nespresso machine. I imagine that's what he got him."

He then got to what "the worst part of the ceremony" was to him: all the damn flowers.

"The most beautiful flowers you've ever seen and I get quite bad allergies if I'm in such close proximity to flowers," he explained. "For a lot of the ceremony I just needed to sneeze. I spent a lot of the time going like this ]holding in sneeze] but right at the point when the archbishop was saying if anyone knows of any reason and I was like this, 'Please don't sneeze, please don't sneeze!'"

"I had to do one of those internal sneezes," he added. "I think I got away from it but there were millions and millions people around the world watched it. Imaging having such a beautiful ceremony that the entire planet actually wants to watch your wedding video!"

In the end, Corden praised the event for being so "inclusive," saying it made him "proud to be British on that day" and thanking the couple for bringing "the world together for a happy occasion."

Relive some of the day's best moments below:

View Photos Alexi Lubomirski/PA Images/Hand Out/ Prince Harry and Meghan Markle's Official Wedding Portraits Will Take Your Breath Away

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