Miley Cyrus and Liam Hemsworth Are 'On a Break,' 'Wedding on Hold'

It's not looking good for Miley Cyrus and fiancé Liam Hemsworth. A source tells RadarOnline.com that the two are “on a break” and that the “wedding is on hold.”

After appearing as a united front at Liam's August 8 “Paranoia” premiere, the relationship seems to have gone downhill.

Miley's twerking at the MTV VMAs reportedly “mortified” Liam… and that was before the naked “Wrecking Ball” video (The racy vid now has over 100 million views!).

Then, without explanation, Cyrus unfollowed Hemsworth on Twitter on Saturday, leading many to speculate that the two have hit a rough patch.

The insider told Radar, “They've split for now. Miley and Liam have a very tumultuous relationship and both are exhausted. It's a complicated relationship. The wedding is on hold, for now. It's not cancelled, but it doesn't look promising.”

The stars have been traveling separately in recent days with Miley building buzz for her new “Bangerz” album in Europe and Liam in Las Vegas with friends to watch Showtime PPV's Floyd Mayweather vs. Canelo Alvarez boxing match.