"They are definitely over," a source told the magazine.
While the 20-year-old singer has been focusing on her new album, the 23-year-old actor has spent time promoting the "Hunger Games" sequel in Cannes and in Australia with family and friends.
According to a previous US Weekly report, Hemsworth's brothers have encouraged him to end his engagement.
"They want him to end the romance for good," a source said.
With rumors of their break up back in full swing, both Cyrus and Hemsworth were spotted out separately in Los Angeles on Wednesday.
Cyrus, who vowed to reserve social media for discussions about her music, tweeted that she was hard at work on her upcoming album.
Cyrus, who vowed to reserve social media for discussions about her music:
5 am- 3am then back on the grind at 9— Miley Ray Cyrus (@MileyCyrus) May 29, 2013