Back On? Miley Cyrus and Ex-Fiance Liam Hemsworth Spotted Together In Australia

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Miley Cyrus reportedly rang in 2016 with ex-fiancé, Liam Hemsworth.

A source told ET that the two rekindled their romance at the Falls Music & Arts Festival at Byron Bay on Saturday in Liam's home country of Australia.

WATCH: Miley Cyrus Helps Liam Hemsworth Adopt a Dog

The "Wrecking Ball" singer and The Hunger Games heartthrob were spotted kissing and hugging at the festival. The source added that they did not seem to be hiding their affection and appeared happy to be together.

The official Falls Festival Twitter account and festival goers also confirmed their reunion, taking to the social media site to share their excitement.

"Miley Cyrus dropped in last night," @fallsofficial shared.

"#BREAKING I spy with my lil eye @MileyCyrus and @LiamHemsworth backstage at falls festival Byron bay hmmmmm #backon #gossip," one eyewitness wrote.

"Welcome back to Aus @MileyCyrus falls festival turnuppppp," tweeted another fan.

The on-again, off-again couple were also joined by Liam's brothers, Chris, 32, and Luke, 35, and their wives, Elsa Pataky and Samantha, respectively.

WATCH: Brandi Cyrus Says Sister Miley's Ex Liam Hemsworth Will Always Be Family

Liam, 25, took to Instagram to share a black-and-white snap, later reposted by Chris, that was taken during Disclosure's set.

"Best brothers. Best mates. Best night!!! Happy new year everyone!" he captioned it.

Luke shared a similar photo, writing, "Pure love . Falls festival 2016 yiiiiiiiiieeeww @liamhemsworth @chrishemsworth best brothers to ever live."

Elsa also posted a pic of her hanging out with Miley, writing: "I love people I can be crazy with!!"

Miley and Liam started dating after meeting on the set of The Last Song in 2010. Hemsworth popped the question in May 2012, but they called off their engagement in September 2013.

WATCH: Miley Cyrus Wraps Up Milky Milky Milk Tour With Rainbows, Pasties & Pamela Anderson

The former couple reunited last November at an animal rescue organization in Los Angeles, when the 23-year-old singer -- an avid animal advocate -- helped Liam adopt a 6-month-old puppy who he nicknamed "Dora the Explorer."

One month earlier, Liam opened up about his relationship with Miley in an interview with Men's Fitness.

"I mean, look -- we were together five years, so I don't think those feelings will ever change," he explained. "And that's good because that proves to me that it was real. It wasn't just a fling."

"It really was an important part of my life and always will be," he continued. "She's a free spirit. I think she'll always surprise people with what she does, but she's not a malicious person in any way. She's a young girl who wants to do what she wants to do."

WATCH: Liam Hemsworth Says He Still Has Love for Miley Cyrus