Liam Hemsworth and Miley Cyrus
08/07/2012 at 06:00 AM EDT
was feeling mighty generous during a Saturday night out with two of her pals and fiancé Liam Hemsworth
. The newly engaged
star picked up the tab for her group after they dined at Studio City, Calif., eatery Kiwami.
Clad in a baby blue button-down top, her signature short jean shorts and tennis shoes, Cyrus kept any PDA to a minimum with her man.
"There was no holding hands or kissing," an onlooker tells PEOPLE. "The group just seemed like they were having a good time catching up."
While the source says Hemsworth was "more quiet and reserved," Cyrus was "outgoing, chatty and seemed like a lot of fun." – Melody Chiu