Liam Hemsworth and Miley Cyrus
09/20/2010 AT 03:00 PM EDT
On-again couple Miley Cyrus
and Liam Hemsworth
cuddled up on the couch in the Dragon Room, a private dining room at Katsuya
in Brentwood, Calif. The two were catching up and "looked so in love," an onlooker says, of their dinner date. According to the onlooker, Cyrus also enjoyed milk and cookies in between whispering into her Aussie beau's ear.