Miley took to Instagram to share the news, posting a number of stunning black and white shots where the singer and Liam are looking adoringly at one another.
The couple tied the knot in a small ceremony on Sunday, according to reports. The 28-year-old actor was clad in an off-white satin gown while Liam wore a traditional black suit with a white shirt.
The pair first met while making the 2010 film The Last Song and were engaged in 2012.
Fans started speculating about Cyrus and Hemsworth's wedding over the weekend, thanks to various social media posts that showed the pair's celebration. In the two images, we see Miley in an off-shoulder ivory dress and Liam in a tux, while cutting a cake together. In a flash forward-like sequence, an apparent nod to their once on-again off-again relationship, Cyrus shared a photo captioned: "10 years later".More news: Winter Storm to Arrive Late Tonight
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She and musician Mark Ronson also released a version of John Lennon and Yoko Ono's Happy Christmas War is Over, recorded with the couple's son Sean Ono Lennon.
They reconnected in 2015, however, and the couple's romance was back in full swing by summer 2016, including dinner with Hemsworth's parents, date nights and spending holidays together. They got back together previous year.
In November, they lost their home in California in the state's devastating wildfires.