To mark the occasion, parents Prince William and Kate Middleton shared a sweet snap of their youngest child to their social ...

"Wishing Prince Louis a very Happy 7th Birthday! 🎂" read the caption of the post. The photo was taken by photographer Josh Shinner. The royals also shared a short video on Instagram that showed ...

🎬 SIGN UP for Parade's Daily newsletter to get the latest pop culture news & celebrity interviews delivered right to your inbox 🎬 "Wishing Prince Louis a very Happy 7th Birthday! 🎂 ...