"Pretty excited to be celebrating Mother's Day with this crew!" the actress wrote alongside an Instagram slideshow of cute pics. "I'm exploding with gratitude for these gorgeous kids and for all the joy, laughter, love and grace they have brought to my life...but more importantly...I wonder what they're getting me! ??."
Heigl also shared some "last minute DIY gift inspiration" for all the "amazing mamas."
"Check out last year's post 'Pretty Useful Things' on my blog," she added. "I have some lovely crafty stuff planned for my mother this year as well but don't want to give it away until Sunday! So stay tuned for a post in the next couple of weeks that will detail this year's gift!"