According to a new report, Liam Hemsworth's family is “iffy” about his fiancee, Miley Cyrus.

As the couple prepares to tie the knot after rekindling their romance months ago, a source claims the Hemsworth family is unimpressed with Cyrus' often off-the-wall behavior.

“Miley’s oversexed tongue-wagging antics have never been the most family-friendly,” a source told OK! Magazine, according to a report by Gossip Cop on Monday.

The magazine's source claimed Hemsworth's brother, fellow actor Chris Hemsworth, does not like her “potty mouth” and isn't “exactly begging Miley to babysit their three young kids.”

“[Liam's] biggest fear is that Miley will return to her wild ways,” the source continued, so he's reportedly keeping the singer on a “short leash.”

"He's even “started showing up unannounced to the set of 'The Voice' just to “check out what she’s up to,” the source said.

And although Cyrus loves having her fiance on set, her co-stars “aren’t so enthused,” the source revealed.

Meanwhile, depiste his family's thoughts, Hemsworth is “determined to make [the relationship] work,” the magazine's insider added.

In response to the report, a source close to Cyrus confirmed the OK! Magazine story was completely “false.”

For more of Miley Cyrus, tune into The Voice season 11 airing tonight and every Monday night at 8 p.m. on NBC.