People think Princess Charlotte got snubbed on her 3rd birthday — and they're blaming Prince Louis

Princess Charlotte may have momentarily upstaged her new baby brother with her sweet royal wave, and she’s managed to hold on to her place in the line of succession, but is she already slipping into middle child mode just a week after becoming a big sister?

May 2 marks the third birthday of Prince William and Kate Middleton‘s only daughter. Traditionally, the couple have marked their children’s birthdays by sharing a new set of photos — typically taken by their own mother, who is a keen photographer — which the public promptly gushes over before storming the shops in search of the kids’ designer clothes.

But not this time. While the Kensington Palace Twitter account posted a birthday tribute to the princess, avid royal-watchers were quick to notice that the accompanying photo wasn’t new. It was taken in January by a then-pregnant Duchess of Cambridge to commemorate her daughter’s first day of nursery school.

While the image has been universally praised, a few folks feel that they — and the birthday girl — have been shortchanged. And yes, some are blaming it all on week-old Prince Louis.

Of course, it’s always possible that the royals will release more photos later on and that the birthday girl is currently covered in cake and presents. Or perhaps the nursery school shoot was intended to double as a birthday portrait, as some have noted that Middleton sometimes shoots her photos months in advance.

Or maybe Prince Louis has just ruined everything for one particular toddler and will pay the price if she beats him to the throne. Nothing says sibling payback like a night in the Tower…

Read more from Yahoo Lifestyle:

• Princess Charlotte’s adorable $62 dress is sold out

• Will Prince Louis inspire a baby-naming trend?

• Prince Louis’s birth certificate has been revealed

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