It's one of the best days of the year!
It's the day we spoil moms an extra amount to thank all of them for their AH-Mazing love and support over the years.
And celebrities aren't too busy to stop and show some gratitude! In fact, some are celebrating as first-time mommies or mommies-to-be this year!
Check out some of the celebs who took to Twitter to send a special thank you to moms celebrating the day with love and relaxation: