Liam Hemsworth is coming home to Miley Cyrus at last ... and now we know why it must have been so tough for him to let go of her in the first place.

Sources told E! Online that the pair are "totally together" and have been "in constant contact" while the Aussie actor was Down Under and then in the Philippines promoting a clothing line.

The pair had been on the rocks for the past few weeks, with allegations of Hemsworth canoodling with January Jones and Cyrus making a point to traipse about without her engagement ring.

For the record, Cyrus later insisted it was out getting fixed, but sources say she was actually just being spiteful. If the former is true, she picked one helluva time to get that done.

The ex 'Hannah Montana' starlet has been keeping busy while Hemsworth is gone by posting pictures of herself on Twitter with her ring on -- and apparently by twerking, which you can see in the video above if you're into that sort of thing.

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