The couple has been engaged for over a year but is going through troubled times.
Cyrus' recent raunchy act on stage with singer Robin Thicke and 23-year-old Hemsworth's link up with actress January Jones had created problems between the couple, reports radaronline.com
"They've split for now. Miley and Liam have a very tumultuous relationship and both are exhausted. It's a complicated relationship," said a source.
"The wedding is on hold, for now. It's not cancelled but it doesn't look promising," the source added.
Cyrus, 20, recently stopped following Hemsworth on micro blogging site Twitter.
--IANS (Posted on 17-09-2013)