See how many celebrities reacted to the happy news:
"Congratulations beautiful ".
"So very happy for you. Thank you for sharing your journey with us! Truly moved by this," she wrote.
"I don’t usually geek out over celebrity couples but Miley Cyrus and Liam Hemsworth are my absolute favorites and my heart is full. Loved this pair since the last song. So happy for them. Makes me so happy with the world," he wrote.
The fellow Aussie left a bunch of love-heart emoji comments.
One fan commented on Miley's photo writing, "congratulations you married the hottest man on Hollywood," and Miley replied, "I knooooowwwww right."