There's one relatively new royal family tradition that I can definitely get behind. That's the birthday photos.

Each year, when the royal children celebrate their birthdays, Kensington Palace releases never-before-seen pictures taken by the Duchess of Cambridge. And they never fail to make us swoon over their cuteness.

SEE ALSO: Meghan Markle finally has an Instagram again, sort of

This time it's Will and Kate's youngest child, Prince Louis -- and he's celebrating his first birthday.

Mashable Top Stories Stay connected with the hottest stories of the day and the latest entertainment news. Sign up for Mashable's Top Stories newsletter By clicking Sign Me Up, you confirm you are 16+ and agree to our Terms of Use and Privacy Policy. Thanks for signing up!

This Tweet is currently unavailable. It might be loading or has been removed.

Get a load of this adorable dog jumper:

View this post on Instagram

The new official account for the Duke and Duchess of Sussex — AKA Harry and Meghan — posted a comment on the pic.

Original image has been replaced. Credit: Mashable

DID MEGHAN WRITE THIS?

---

Featured Video For You

---

Princess Charlotte and Prince George's balloon game reminds us of what childhood's really like

---