"This is where my heart is," Palmer writes. "To my precious baby- I'm so blessed to be your mama, we have been wishing for you for awhile. We love you so much and can't wait to kiss your little face and tiny toes. Thank you for hearing our prayers. @likemark."
In the Instagram pic, Palmer shows off her black and white sonogram sitting beneath two adorable little knitted baby booties.
A bundle of joy isn't the only special thing in Palmer and Webber's futures. The couple announced their engagement earlier this month.
Congrats, you two!
Instagram