It seems Camilla Parker Bowles briefly got on her daughter-in-law's nerves during the royal wedding!

A brief moment between Camilla and Kate Middleton went viral Saturday after cameras captured Kate delivering an unmistakeable side-eye right at her mother-in-law while the two were seated in St. George's Chapel at Windsor Castle.

Although Camilla's face was largely covered by her oversized fascinator, eagle-eyed viewers noticed that she was murmuring something quietly when Kate nonchalantly shot the side-eye in her direction. Watch the moment below:

We've all been there, Kate.

Who knows what Camilla could've been mumbling -- maybe she was overheated, maybe she was hungry, maybe she wasn't feeling the gospel choir -- but whatever it was, kudos to Kate for her understated but crystal-clear response.

See photos of from Prince Harry and Meghan's royal wedding:

Camilla and Kate were two of the last arrivals to the ceremony, which meant there were some "Where are they?!" moments from viewers who didn't realize they were scheduled to pull up just before the doors closed.

While Camilla walked in with her husband, Prince Charles, Kate had some very different dates by her side when she entered the chapel: Little Prince George and Princess Charlotte, who enjoyed the ceremony while flanked by other young guests.

See photos of Prince George and Princess Charlotte at the royal wedding: