Disney's former Hannah Montana star Miley Cyrus is engaged! Australian actor Liam Hemsworth proposed to Cyrus with a 3.5 carat engagement ring. The pair have been dating for three years. He popped the question to 19-year-old Cyrus on May 31, according to People.

Hemsworth, and Cyrus, hooked up while starring in the movie "The Last Song" in 2009. Cyrus told People: "I'm so happy to be engaged and look forward to a life of happiness with Liam."

Hemsworth stars in box office hit "Hunger Games". There are no reports of a set wedding date yet.

Miley has been making it very clear that she is no longer the teen star who stared in Disney's Hannah Montana. She has already shot her first sex scene in a movie, LOL, with British actor Douglas Booth.

She has also recently spoke out about the beauty of sex. "Sex actually is really beautiful. It's the only way that we create and it's the only way that the world keeps going," she said, while urging mothers to talk to their teenage daughters about sex.

She also told Amanda DeCadenet: "It's ignorant to not talk to your kids about it or to (not) make it seem as magical and cool as it actually is. They (teenagers) have a TV; they know what sex is... Educate them. Let them know that they wouldn't be here without it. It is a beautiful thing and it is magic and it is when you connect with somebody - and it isn't how much you're worth."

(View Photos of Miley Cyrus and Liam Hemsworth Cuddling at the Red Carpet)

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