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With the caption "10 years later" and the date "12.23.18," the "Wrecking Ball" singer posted a trio of photos on Instagram and Twitter late on Wednesday of her in an off the shoulder white dress, hugging and kissing Hemsworth.
Hemsworth, 28, posted one of the photos on his Twitter account, writing "My Love" and a heart emoji.
First reports of the small Dec. 23 ceremony emerged on social media on Christmas Eve.
Cyrus, the 26-year-old former Disney Channel star of comedy "Hannah Montana," met Australian actor Hemsworth while filming their 2010 romantic film "The Last Song" and announced their engagement in 2012.
After splitting up a year later, they got back together again and announced their second engagement in 2015.
The home they shared in Malibu was destroyed in the November wildfires that swept through parts of southern California.
Representatives for Cyrus and Hemsworth did not respond on Thursday to a request for comment but People magazine said the couple had originally planned to wed in their Malibu home.
After the fire, they switched the venue for the Dec. 23 nuptials to Cyrus's home in Franklin, Tennessee, People magazine reported.