Miley Cyrus and longtime love Liam Hemsworth are engaged, their reps tell People Magazine.

Miley tells the mag: "I'm so happy to be engaged and look forward to a life of happiness with Liam."

Hemsworth proposed on May 31 with 3.5-carat diamond ring from jeweler Neil Lane. Cyrus, 19, met Hemsworth, 22, on the set of The Last Song in 2009.