Miley Cyrus and Liam Hemsworth look set to tie the knot (2 PICS)

Australian actor Liam Hemsworth and actress/singer Miley Cyrus arrive at the 2012 Vanity Fair Oscar party in West Hollywood.

STARLET Miley Cyrus and hunky Aussie beau Liam Hemsworth could soon be tying the knot.

The rumour-mill went into overdrive that the young lovers are engaged after Cyrus posted a picture of herself wearing a huge engagement ring on social networking website twitter.

Hemsworth, 22, and Cyrus, 19, have been dating since meeting on the set of their 2009 film The Last Song.

Until recently, the Philip Island local has been known mostly for his relationship with the Hannah Montana starlet and as the younger brother of actor, Chris - who starred in Thor.

But Hemsworth's star is on the rise thanks to a leading role in the blockbuster film The Hunger Games.

He will also step into Mickey Rourke's shoes and star alongside his childhood heroes Sylvester Stallone, Bruce Willis and Arnold Schwarzenegger in The Expendables 2.

The loved-up pair last appeared together for the US premiere of The Hunger Games where, when asked what the biggest challenge for Liam was while filming the drama movie, Miley said: "I think the hardest part for Liam was being away from me.''