Is there something odd about this royal photo?

The Duke and Duchess of Cambridge with Prince George, 4, and Princess Charlotte, 2, in a family portrait taken earlier this year. The image appears on the family's Christmas card. Photo / AP

People of the internet are so ridiculous sometimes...

Last week, we were all treated to a new official royal portrait on the Duke and Duchess of Cambridge's Christmas card.

"George looks so big" and "Charlotte is so cute!" was what everyone was saying until Twitter users realised something wasn't quite right with the image.

Social media users were convinced that Kate seemed to have lost her arm in an accidental Photoshopping mishap. The most likely situation is that her arm would be resting behind Prince William but as this royal couple do not show PDA, that could not be the case.

So where is Kate's arm?

View this post on Instagram

The Duke and Duchess of Cambridge are pleased to share a new photograph of their family. The image features on Their Royal Highnesses' Christmas card this year. The photograph shows The Duke and Duchess of Cambridge with their two children at Kensington Palace. It was taken earlier this year by @chrisjacksongetty Their Royal Highnesses have also announced this morning that Princess Charlotte will attend the Willcocks Nursery School in London from January 2018. The Willcocks Nursery School has said: "We are delighted that The Duke and Duchess of Cambridge have chosen the Willcocks Nursery School for Princess Charlotte. We look forward to welcoming Charlotte to our nursery in January."

A post shared by Duke and Duchess of Cambridge (@kensingtonroyal) on Dec 18, 2017 at 3:25am PST

Whether the royal family have been made victim to a case of bad Photoshopping or just awkward arm placement, it's still clear that the young family are adorable.

We can't wait to see next year's Christmas card with the addition of the couple's third child.

- ZM Online