"The girlzzzz Happiest Anniversary @mandymooremm & Ryan!!!," she captioned the snap, which showed the Tangled star, Kelly, and a group of other girl friends dressed up in hats and retro garb for the themed bash.
For the fete, Moore opted for a sparkly strapless dress paired with a straw hat, while Kelly donned a floral dress with a huge polka dot bow.
"Celebrating love w the greatest friends and family last night. Feeling incredibly grateful today.…," Moore posted on Instagram Sunday evening, along with a split shot of the same pic Kelly posted and a photo of her singer-songwriter hubby and his pals.
Prior to their big bash, Moore commemorated their wedding anniversary by Instagramming a pic of their marriage license with the caption, "The best 5 years…."
The couple wed in a private ceremony in Georgia when she was just 24 and he was 34.
-Additional reporting by Lindsey Caldwell