Amy first announced her engagement on Twitter by posting a photo of Dillon's proposal on July 13.
PHOTOS: A Duggar Family Album
She also showed off a pic of the huge rock (not a muddy one) on Instagram while sharing her thoughts and feelings for her husband-to-be. "He loves the Lord, he makes me laugh uncontrollably, he's loyal, he's patient, he's my best friend!" she wrote excitedly. "Of course I said yes!!"