In the midst of his divorce fromestranged wife Chrishell Stause,Justin Hartleystepped out for a fun night out with his pals on Saturday.
TheThis Is Usactor, 42, attended producer Jennifer Klein’s annual holiday party at her Los Angeles home, sources tell PEOPLE exclusively.
Mostly mingling with a group of male friends, the newly single star — who filed for divorce on Nov. 22 — also spent time catching up withJosh Duhameland his girlfriendAudra Mariinside the bash.
“Justin was one of the last of the guests to leave. He was there until at least midnight,” an onlooker tells PEOPLE. “He was in great spirits and was being super social. He worked the room and caught up with guests likeChace Crawford,Topher GraceandJennifer Morrison.”
Chrishell Stause; Justin Hartley.Matt Baron/Shutterstock; Frazer Harrison/Getty Images

Hartley wasn’t the only newly single star to hit the party.Christina Hendricks— whoannounced her split from Geoffrey Arendin October — was the belle of the ball at the festive celebration, where guests sipped onDon Julio cocktails,Good Day coffeeand snacked onShake Shackburgers and aChipotletaco bar.
“She was the happiest she’s ever looked and was dancing up a storm,” says the onlooker. Hendricks, who wore a floor-length black dress with white ruffles, was seen partying next toMachine Gun Kellyand also caught up withanother newly single actor — Dave Annable— near the dance floor.
Last week, multiple sources confirmed to PEOPLE thatStause had moved out of Hartley’s houseand into a new home.
Justin Hartley and Chrishell Strause Hartley at the Emmy Awards.Frazer Harrison/Getty

“Yes, they’d had some problems, but she certainly never thought he would just go and suddenly file for divorce, and not even try to save things,” one source previously told PEOPLE.
But an additional insider pointed out thatStause is not the only one upsetthat their relationship has ended.
“Justin is obviously very disappointed that his marriage didn’t work,” the insider said, adding that the couple’s work schedules often kept them apart.
The duotied the knotin 2017 in a rustic and romantic ceremony at Calamigos Ranch in Malibu, California, exchanging vows in front of 75 of their closest friends and family members.
source: people.com