Miley Cyrus and Liam Hemsworth are engaged.

The Hunger Games actor proposed to his girlfriend of three years on May 31 with a 3.5-carat diamond ring from jeweller Neil Lane. "I'm so happy to be engaged and look forward to a life of happiness with Liam," Miley, 19, told People.

The "LOL" actress also Tweeted today, "life is beautiful."

The couple met while working together on The Last Song in 2009 and Liam, 22, has previously admitted while he wanted to be professional on the film, they couldn't help but fall in love after working so closely together: "What happened happened, and we've been together since. She makes me really happy. When you start, you want to be professional, but when you're filming those scenes with someone and pretending to love them, you're not human if you don't feel something." In turn, Miley has said that Liam is the perfect guy because he listens to her.

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