Liam Hemsworth Premieres The Last Song in Melbourne

Liam Hemsworth shows off his charming smile as he premieres his new flick, The Last Song, at the Village Jam Factory in Melbourne, Australia on Wednesday afternoon (March 17).

The 19-year-old Aussie actor stars as Will in the movie, out in US theaters on March 31.

Meanwhile, on-and-off screen girlfriend Miley Cyrus was spotted out with mom Tish gassing up the car and arriving at a studio in North Hollywood on Tuesday afternoon (March 16).

30+ pics inside of Miley and Liam…