Liam Hemsworth cheating on fiancée Miley Cyrus?

Gossip websites are suggesting that all isn't dandy in the Miley Cyrus-Liam Hemsworth paradise.

After months of a rumoured commitment, Miley Cyrus, officially got engaged to Liam Hemsworth, who she met when the pair co-starred in The Last Song in 2009. The Australian actor proposed to Cyrus on May 31 with a 3.5-carat diamond, according to People magazine.

But when one cuts to present, things are a bit dodgy. The Australian actor reportedly got together with Mad Men beauty January Jones at a pre-Oscars party. Liam attended the bash without Cyrus and was spotted cuddling with the single mom.

A witness told US Star magazine: “It looked like they had some hot chemistry.

“They were all over each other – and they even kissed!”

What's heartbreaking is that this report comes in the wake of Miley gushing about Liam in an interview and even referring to him as her "hubby". Ouch!

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