Sporting a tiny black bikini, Cyrus packed on the PDA with Kaitlynn who just announced her split from husband of one year.
Cyrus and Hemsworth have been subject to several split rumours over the past months, including a report that they were recently caught arguing in public at a private members club in Malibu.
Rumours of a split were further fuelled when Miley went on to perform at Glastonbury Festival, and set tongues wagging again when she ranted "I'm f**ing sick of men," while performing her hit song 'Wrecking Ball' onstage.
In late July, Hemsworth was spotted looking noticeably downcast as he watched an AFL game in Australia.
Miley and Liam, 29, met on the set of 2009 movie, The Last Song.
The couple finally married in a secret ceremony at their home on Christmas Eve last year.
WATCH: Miley Cyrus speaks out for the first time since shock split with Liam Hemsworth