Apparently, the pair couldn't keep their hands off each other as they walked to his car, stopping in the parking lot several times to kiss and cuddle.
The 31-year-old actress has been single since last year, when she announced she was divorcing British musician Royston Langdon - with whom she has a four-year-old son, Milo, reports The China Daily. Recently, Liv revealed she felt physically sick when she split from her husband last May, and still finds the break-up difficult to come to terms with.
She said: "There's nothing worse than heartache, being lovesick. It's like there's a physical sickness. You go through a couple of weeks where you think, 'Oh, I'm OK, I feel better,' and then suddenly, out of nowhere, it hits you again.
"The hardest part is when they move out. It also brings up a lot of issues - you might feel like a failure, or like there is something wrong with you. You can't run away from yourself - you kind of have to just deal with it."