Netizens have discussed Kate Middleton’s reaction when Princess Charlotte stuck her tongue out.

On Thursday, the Duke and Duchess of Cambridge stepped out for the King’s Cup regatta. Prince William and Middleton took Prince George and Princess Charlotte along.

Middleton was caught on camera encouraging her daughter to greet the crowd. However, instead of showing her royal wave, the little princess stuck her tongue out and Middleton just laughed.

One netizen took to Quora and asked if the duchess’ reaction was appropriate. A number of online users believe that it was just right.

According to Gail Lucas, a mom and grandma, Middleton’s reaction was a “spot on.” Another said that the Duchess of Cambridge’s reaction was natural.

“Her reaction was so adorable and natural. Honestly, brings a tear to my eye. I like seeing realistic things. It makes me happy in this age,” Stephanie Phillips, who studied Philosophy & Law at Harvard University, wrote.

According to Eileen Wood, a republican, Princess Charlotte knows better and has figured out that she’s cute and can make the crowd laugh. So what she did was not that big of a deal. She added that Prince Harry did the same when he was a kid and even when he was already grown up.

Another user defended Princess Charlotte saying that she is a kid who is “happy and full of beans.” The same netizens shared a snap of Prince Charles doing a salute when he was a child and wrote, “I prefer a ‘cheeky tongue’ over a ‘stiff salute.’”

Meanwhile, contrary to Middleton’s reaction, according to body language expert Judi James, Carole Middleton wasn’t as amused.

“Kate’s reaction is hilarious here and probably totally appropriate for the moment, although Grandma Carole looks as though she might be thinking of nipping this playful naughtiness in the bud,” James said.

James noted that the habit runs in the royal family. It wasn’t just Princess Charlotte who did it because her father Prince William and uncle Prince Harry also did it.

“Carole needs to proceed with caution though as she might be on dodgy ground laying down any rules about tongue-poking as one of the royal family’s most avid fan of this pose was Charlotte’s dad William when he was her age,” Judi added.

Kate Middleton and Princess Charlotte
Pictured: Middleton and Princess Charlotte after attending Prince Harry and Meghan Markle’s wedding at St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018. Getty Images/Jane Barlow