The good-looking couple stopped by the MAC Cosmetics and MAC AIDS Fund premiere of the HIV/AIDS documentary It's Not Over in West Hollywood last night but made sure to stay under the radar.
Shortly after slipping into the event, the "We Can't Stop" singer and model grabbed a bite at nearby eatery, RivaBella.
Cyrus and her new beau arrived through the back door and shared a truffle pizza and pasta dish during their romantic late-night dinner.
An eyewitness tells E! News that the two "were very smiley and cute with one another" and that they seemed really "into each other."