Kate Middleton
Kate Middleton’s right arm wasn’t visible in their royal family Christmas card photo, and fans couldn’t help but notice. Pictured: Middleton leaves the Grenfell Tower National Memorial Service held at St Paul's Cathedral on Dec. 14, 2017 in London, England. Getty Images/Chris Jackson

Prince William and Kate Middleton released this royal Christmas card earlier this week, and it got their supporters talking.

The couple and their two children, Prince George and Princess Charlotte, all wore color coordinated clothing during their photo shoot, which may have taken place during Prince George’s fourth birthday.

Everything in the photo seemed well especially since royal photographer Chris Jackson managed to capture Prince George and Princess Charlotte smiling at the camera.

But some fans also noticed a major error in the photo: the right arm of Middleton appeared to be missing. The Sun shared the photo and encircled the area where Middleton’s right arm should have been, and it looked as though it was mistakenly edited out.

On Twitter, a handful of royal fans also started a “petition” urging everyone to help search for the Duchess’ arm. Others also came up with the hashtag “Where’s Kate’s Arm?”

But since Middleton is standing very close to her husband, it’s possible that the Duchess’ right arm was placed behind Prince William’s back. However, this may also be unlikely because the couple does not typically touch each other in public.

As of late, it is still unclear whether or not the Kensington Palace will release another Christmas card photo of the royal family. The palace was also the first one that shared the snap on social media on Monday, Dec. 18.

Meanwhile, Prince William and Middleton’s engagement photos resurfaced online after Prince Harry and Meghan Markle also shared their official engagement pictures.

According to E! News, the photos of both couples have obvious similarities. In 2011, the Duke and Duchess of Cambridge released one formal and one informal picture, and that’s exactly what Prince Harry and Markle did following their Nov. 27 engagement.

But Meghan’s Mirror editor Christie Ross noted some distinctions between the couple’s photographs. “In the relaxed photographs, Kate and William look as happy as can be, but kept to more modest, traditional poses. In a stark contract, Harry and Meghan’s chemistry is hard to miss in their intimate, almost-kissing photograph. This really sheds light on the difference between the two brothers,” she said.