Miley Cyrus Engaged to 'Hunger Games' Star Liam Hemsworth

Miley Cyrus, Liam Hemsworth

A young power couple, Miley Cyrus and Liam Hemsworth lit up the Elton John AIDS Foundation Viewing Party. Hemsworth is set to break out in The Hunger Games, while Cyrus will co-star with Demi Moore in the comedy LOL and also star with Jeremy Piven in So Undercover.

UPDATED: The 22-year-old actor proposed to his bride-to-be, 19, on May 31 with a Neil Lane engagement ring.

After three years of dating, Miley Cyrus and Liam Hemsworth are engaged.

Hemsworth, 22, the Australian actor who plays Gale in The Hunger Games film franchise, proposed to the 19-year-old Cyrus on May 31 with a 3.5 carat Neil Lane diamond ring, Hemsworth's rep confirms to THR.

"I'm so happy to be engaged and look forward to a life of happiness with Liam," the singer-actress says in a statement to People magazine.

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A rep for Cyrus did not immediately respond to THR's requests for comment.

The pair formed a bond as co-stars in 2009's The Last Song. (On June 1, the day after Hemsworth popped the question, Cyrus tweeted: "heaven is a place on earth.")

Cyrus is working on her forthcoming album; Hemsworth has been shooting the crime drama Empire State in New Orleans, after which he will join Harrison Ford and Gary Oldman to film the thriller Paranoia, after which he jump back into Hunger Games mode to shoot the sequel alongside Jennifer Lawrence.