Miley Cyrus and Liam Hemsworth call off engagement: Reports

The queen of twerking will be without her king.

Miley Cyrus and now-former fiancé Liam Hemsworth have ended their relationship of four years, after Cyrus allegedly couldn't deal with her man's reported unfaithfulness, according to published reports.

The split was "Miley's decision, after coming to grips with Liam being what she believed was less than faithful to her," a source told E! News.

The couple started dating in 2009 after starring together in "The Last Song," and were engaged in 2012.

Speculation about their split has raged since rumors began in February that Hemsworth, 23, was romantically linked to "Mad Men" star January Jones. Both sides denied the reports.

Chatter about the impending split hit a climax this weekend, when Cyrus, 20, unfollowed Hemsworth on Twitter.

Reps for both camps didn't respond to requests for comment.