IT’S OFFICIAL: Liam Hemsworth and Miley Cyrus are engaged.

The couple’s reps confirmed with WHO magazine that Aussie actor Liam Hemsworth, 22, proposed to Cyrus, 19, at the end of May in Los Angeles after three years of dating.

In what was described as a “really romantic” gesture, WHO reports that Hemsworth popped the question with a 3.5 carat, cushion-cut diamond set gold band from celebrity jeweller Neil Lane.

Lane revealed that the Hunger Games actor wanted a ring that was “unusual”, “beautiful and romantic”.

"It's all very new for them. They're just so in love and so happy that the can take things to the next level," the source said.

Miley’s celebrity father Billy Ray Cyrus tweeted after the announcement, "All I ever hoped for as a Daddy was to see my kids reach their dreams. To find happiness ... peace of mind ... and someday know ... true love."

No wedding date has been set.