Chelsea Handler is known for her comedic chops just as much as being one of Jennifer Aniston's friends.

She was recently seen hanging out with Sandra Bullock for the actress' 50th birthday, and a source told Us Weekly that "Sandra fits right in [with her clique]."

Handler and Bullock celebrated with Whitney Cummings in Jackson Hole, Wyoming. They went to the Million Dollar Cowboy Bar for Bullock's birthday. The source said that Bullock "wanted to let loose and talk dirty."

The women were at the bar from 9 p.m. to 10 p.m., said a source.

"They checked out the band Southern Allstars. It looked like they were just having a girls night... about six or seven of them," the source added.

Handler shared images of the birthday gathering on her social media pages.

Handler captured a sweet moment between Bullock and her sister. The comedian captioned the photo with, "Happiest birthday."

In another photo, the eight birthday party attendees pose in front of a picturesque scene, where one partygoer decided to moon the cameras.

Other members of Handler's clique include Reese Witherspoon and Aniston. Turns out Bullock and Aniston are becoming good friends.

"Jen and Sandra are new BFFs," the source said. "They're very excited about the new friendship."

Handler recently talked to good friend Aniston's boyfriend, Justin Theroux.

The "Leftovers" actor explained why he gives his friends eggs, according to E!

"We have too many of them," Theroux said. "We have about 10 chickens and each of them lays a couple a day, so we have too many eggs. But they always think we're being really sweet, like this farm and table thing where you bring a bunch of eggs. We're just slipping on eggs at the house."