The royals are usually known for keeping a stiff upper lip, but Prince Charles and Camilla were caught cracking up while watching a cultural display in Ottawa, Canada.
The Prince and the Duchess of Cornwall were present at a ceremony in Iqaluit, where they were treated to an Inuit throat singing performance, The ABC reports.
Footage from the event was shot on June 29, but has only surfaced now.
In the video, Camilla covers her mouth as she bursts into a fit of laughter and Charles gives her a knowing look.
According to news.com.au, throat singing, known Katajjaq, is an Inuit practice traditionally performed by two women. The pair take turns making sounds and inhaling and exhaling to see who can last the longest.
Some users criticised the the royals’ giggles as being “bad form”, culturally insensitive and disrespectful.
Meanwhile, a National Geographic video on throat singing notes that the practice is a playful competition in which “the first person to laugh, stop, or run out of breath loses”.
Back in 2015, these young Inuit throat singers stole the show at Canadian Prime Minister Justin Trudeau's swearing-in ceremony. Amazing!