Liam Hemsworth and Miley Cyrus
06/06/2012 at 11:00 AM EDT
Wedding Party in the U.S.A.!
and Hunger Games
star Liam Hemsworth
are engaged to be married after three years of dating, their reps confirm to PEOPLE exclusively.
"I'm so happy to be engaged and look forward to a life of happiness with Liam," Cyrus, 19, tells PEOPLE.
Australian actor Hemsworth, 22, who met Cyrus when they costarred in The Last Song
in 2009, proposed on May 31 with a 3.5-carat diamond ring from jeweler Neil Lane.
Next up for the couple: Cyrus is in the studio working on a new album, while Hemsworth is currently filming Empire State
in New Orleans. He'll also shoot Paranoia
with Harrison Ford and Gary Oldman before beginning production on the second Hunger Games
For more on Cyrus and Hemsworth's engagement, including what their families think – and to see a photo of Cyrus's ring – pick up this week's issue of PEOPLE, on newsstands Friday
Reporting by JD HEYMAN and ELIZABETH LEONARD