Piers Morgan's wife Celia Walden appeared on Friday's Good Morning Britain to discuss the royal wedding.
When the topic turned to wedding vows, Celia said she believes Meghan Markle will not be saying she will "obey her husband" during her vows with Prince Harry on Saturday.
But Celia left Kate Garraway stunned after revealing that was actually one of her own vows to Piers.
Celia said: "Somebody was saying she's not going to obey because Diana said she wasn't going to obey.
"It's gone completely out of fashion to say 'I'm going to obey' for obvious reasons."
Kate then asked the journalist: "Talking of obedience and weddings, what was yours and Piers Morgan's wedding day like? Did you obey?"
"I did obey," Celia replied.
"Did you?! You fool!" Kate quipped.
I very firmly believe in obeying.
"I very firmly believe in obeying," Celia added. "It was a little bit smaller than this one actually," comparing her wedding ceremony to the royal wedding.
Celia, 42, and Piers, 53, tied the knot in 2010 in a private ceremony in Oxfordshire.
The couple have one daughter together, six-year-old Elise.
Last month, Celia took the opportunity to embarrass her hubby during his appearance on Lorraine.
Celia surprised Piers by calling into the show while he shared his "beauty secrets".
Revealing her theory on why Piers looks so wrinkle-free, Celia said: "I have a theory about Piers's freakish smooth forehead.
"His ego is so large it is pushing outwards and plumping the skin from within."
"I have yet to get a dermatologist to substantiate this but I'm a pretty sure it's what's going on!" she added.
Piers exclaimed: "What?!" before joking, "Why don't you get back in the kitchen... I'm not having you say this on live TV!"
Don't miss out: Three steps to ensure you see all ED!'s latest news on Facebook
Piers admitted he isn't a fan of cosmetic surgery, saying: "I've told Celia if she has this stuff to her face, then we are done.
"The secret to just looking remotely OK is exercise, eating healthily and being careful.
"Don't go to a plastic surgeon who carves up your face and makes you look ridiculous."
When are your views on cosmetic surgery? Leave us a comment on our Facebook page @EntertainmentDailyFix and let us know what you think!