The Sussex Royal Instagram account shared a gorgeous photo of Meghan in relation to her big day.
"Wishing HRH The Duchess of Sussex a very Happy Birthday," the account wrote next to a cake emoji.
Harry, 35, added a special note at the end of the photo's caption. "Happy Birthday to my amazing wife. Thank you for joining me on this adventure!"
Actress Jameela Jamil and many others left Meghan some birthday love in the comments section.
Meghan's 37th year was filled with a ton of joy for not only her but her husband as well.
They welcomed their first child, a son named Archie, on May 6, 2019.
Archie's christening was held on July 6, 2019. His grandmother Doria Ragland and many others were in attendance.