Reps for both of the young stars have confirmed to People magazine that the pair have called off their engagement.
Miley, 20, and Liam, 23, began dating in 2009 after starring together in 'The Last Song', and became engaged on May 31, 2012.
Sources told E! News the split was "Miley's decision, after coming to grips with Liam being what she believed was less than faithful to her."
In August, Miley told The Huffington Post UK: "There is no one in the world that hasn’t had their heart broken." And when talking about her new ballad 'Wrecking Ball', which is rumoured to be about Liam, she said it is a song for "everyone to cry to".
Back in February, Star magazine first reported that Liam got "hot and heavy" with "Mad Men" star January Jones at a pre-Oscars party at the Chateau Marmont hotel. Those cheating rumors flared up again last week, when Us Weekly reported that Liam has been sexting the 35-year-old actress. A rep for Hemsworth denied the magazine's claim, telling E! News, it was nothing but "tabloid fiction."
The last time the couple were spotted together was on 8 August for the red carpet premiere of Liam's film 'Paranoia' in Los Angeles.
And after Miley's controversial VMA performance, which included her shaking her butt at Robin Thicke while wearing nude latex underwear, a source told Us Weekly that Liam found the show "mortifying".
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