Liam Hemsworth ditches fiancé Miley Cyrus for a much older blonde

Was Liam Hemsworth cheating on Miley Cyrus with Mad Men actress January Jones this past weekend? That's what the reports are saying.

INFDaily

The 23-year-old Hunger Games star met the 20-year-old pop-star on the set The Last Song in 2009 and the two have been dating on and off ever since. They announced their engagement June 2012 and there have been rumors swirling around that the couple has already secretly tied the knot.

But with more cheating rumors spreading, marriage for the two young stars could be out of question.

According to Radar Online, the Australian actor was seen getting ‘hot and heavy’ with the 35-year-old single mother at a pre-Oscar party last weekend.

“They were all over each other — and they even kissed,” an eyewitness leaked to Star.

When Hemsworth arrived at the Chateau Marmont hotel, Cyrus was nowhere insight. She was busy proving she can’t be tamed at Elton John’s annual Oscar party. Sources told the magazine that she was “all over the place” and “gave off the impression that she was single.”

Apparently she wasn’t the only one.

After cozying up to each other at the event, Hemsworth and Jones were photographed leaving in the same car, after attempting to make separate exits, according to Daily Mail .

Both Hemsworth and Cyrus have been accused of cheating in the past, but will Hemsworth’s recent rendezvous be the one to end their engagement?