Tyra Banks, Eirk Asla

Photographer Group/Splash News

Hollywood's finest kicked off the holiday season at TV and film producer Jennifer Klein's annual party this past weekend.

Kaley Cuoco, Tyra Banks, Charlie Hunnam, Jamie Foxx and Amy Adams were among those making the scene at the VIP party in Brentwood, while six-time Emmy winner Allison Janney rolled up to the party with her real-life leading man, producer Philip Joncas.

And yes, there were even more stunning faces to be seen.

Chace Crawford, Jennifer Klein Party

Photographer Group / Splash News

Chace Crawford, Aaron and Sam Taylor-Johnson, Katharine McPhee, Elizabeth Olsen and Scandal stars Tony Goldwyn, Darby Stanchfield, Bellamy Young, Scott Foley and Katie Lowes all seemed to be having a blast too!

The recently single Cuoco's 30th birthday celebration also continued that night. The Big Bang Theory star stunned in a black backless shirt and knee-length gold pleated skirt, and she brought her favorite party date—sister Briana—for maximum party enjoyment.

"It was definitely girls' night out and a very festive holiday atmosphere," a party insider told E! News. "[Kaley] hung out a lot on the outside dance floor, moving to the music, talking to people and snapping photos with her friends."

Cuoco chowed down on some Garrett Popcorn while catching up with Katharine McPhee, who toasted the holidays with Freixenet. The Scorpion star attended with her boyfriend, Elyes Gabel.

"Kaley was beaming and she looked really happy. She was really having a good time. You could see it in her face. She was smiling, laughing, joking around," a source said. "She had a real carefree spirit about her. She's really enjoying her single life and freedom, and hanging out with girlfriends and just having fun."

Guests were also offered a little liquid courage in the form of festive holiday-themed drinks such as the "Christmas Morning," made with Ketel One vodka and fresh juice from Pressed Juicery.

Charlie Hunnam, Morgana McNelis, Jennifer Klein Party

Photographer Group / Splash News

Hunnam enjoyed the music with his longtime girlfriend, Morgan McNelis. The star of the upcoming Knights of the Roundtable: King Arthur cooled off on the dance floor drinking Icelandic Glacial Water.

"They enjoyed hanging out chatting and dancing to the music on the dance floor. They looked so happy holding hands throughout the night," an eyewitness told E!

Adams came with her hubby, Darren Le Gallo, and had a ball catching up with Foxx, who sampled the fare at the Chipotle Mexican Grill taco bar.

"Amy was beautiful. She wore a gorgeous flowered dress. You could tell she was having a great time," an eyewitness said.

Amy Adams, Jennifer Klein Party

Photographer Group / Splash News

Banks, rocking longer locks these days, came with her longtime beau, Erik Asla, and gal-pal Rachel Roy. The lovely ladies indulged in the Lolli and Pops candy at the dessert bar.

Tyra "was really loose and relaxed. She had just celebrated her birthday [the night before] and was going out for a little post-celebration with her boyfriend and close friends. She looked great with her new long hair style," an eyewitness told E! News.

Olsen and Aaron Taylor-Johnson enjoyed a mini Avengers: Age of Ultron reunion and Tony Goldwyn adorably spent most of the night on the dance floor catching up with daughter Anna Musky-Goldwyn, a writer on Supergirl

Father and daughter "had the best time together," with Goldwyn showing off his dance moves, an eyewitness says. "He really was shaking it up on the dance floor… They were both smiling and laughing." They were joined by the Scandal star's niece Emily Goldwyn and at one point Colin Egglesfield joined in on the dancing fun.

Elizabeth Olsen, Jennifer Klein Party

Photographer Group / Splash News

DJ Tendaji Lathan kept the beats coming with a little help from his sister, The Perfect Guy star Sanaa Lathan—and the stars kept coming too!

Kim Raver, Adam Scott, Dylan McDermottBill Paxton and Molly Sims were spotted, and Bill Maher was caught talking politics, particularly "climate change and ISIS"—a little light party conversation—with Up in the Air screenwriter Sheldon Turner and Flesh and Bone producer Lawrence Bender.

Guests also had the opportunity to snack on a host of mouthwatering sugary treats, including brownies by Sprinkles, barkTHINS chocolate bark, icdc donuts, Snappers by Edward Marc Chocolatier, Baked by Melissa gluten-free cupcakes and Salt and Straw's peppermint mocha ice cream.

Celebs left with complimentary Health-Ade Kombucha (may as well get a jump on the New Year's cleanse) as well as given some Coffee Bean and Tea Leaf hot chocolate for a cozy ride home.

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