Miley Cyrus U-Haulin' Ass to Liam Hemsworth's House

Miley Cyrus and Liam Hemsworth's renewed relationship is moving QUICKLY, as in ... they've already moved in together.

Miley and some friends drove a U-Haul truck over to Liam's pad in Malibu, where she unloaded junk from her trunk this weekend. It was the finale of her week-long moving process ... according to our Miley sources.

As we reported ... she's already wearing the engagement ring again, which Liam gave her years ago.