The on-again duo skipped the red carpet but made their relationship status clear as they cozily snuck into the Regency Village Theatre after the lights went down, then emerged at the end of the movie holding hands.
The date night comes just three days after the pair were spotted for the first time together since getting re-engaged. Last Friday, Cyrus joined Hemsworth's family for an L.A. lunch.
The couple attended Monday's premiere in support of Hemsworth's brother Chris, who plays the titular role in the fantasy drama, out April 22.
Although the pair kept a low-profile at the premiere, escaping out a back entrance with the help of a security team, the duo did take the time to individually pose for photos with a fan who shared the shots on Twitter.
And for anyone still questioning their relationship status, Hockman also tweeted that "Miley and Liam are totes back together, FYI."
Miley and Liam are totes back together, FYI.— Kayla Hockman (@kduhh) April 12, 2016
Kevin Winter / Getty
Cyrus, 23, and Hemsworth, 25, were first engaged in May 2012, but broke things off in September 2013. However, eagle-eyed fans spotted the pair kissing at an Australian music festival this past January, and shortly after a source told PEOPLE they were engaged again.
"Things are great between them," a source recently told PEOPLE of the pair. "There are no set wedding plans, and they are enjoying their engagement."
Reporting by REAGAN ALEXANDER