Elizabeth Hurley and Billy Ray Cyrus have gone from Instagram official to regular social media sharers … ’cause she posted another PDA-packed pic with him Sunday.

The actress shared a photo where Billy’s standing behind her … arms wrapped around the upper part of her chest and her stomach, head resting on hers.

BRC’s got a soft smile on his face … while EH’s grin lights up the photo — teeth shining a bright white in the snap.

As you know … Elizabeth and Billy went Instagram official a week ago — smooching up a storm in a picture they both shared on social media.

Hurley dished on their romance a few days later … using the word “love” — so, it’s clear the relationship is pretty dang serious.

Elizabeth also admitted Billy first reached out to her during his turbulent relationship with Firerose … his wife of only about a year, who accused him of emotionally abusive behaviors, allegations Billy has denied multiple times.