Update!

Sandra Bullock Celebrates 50th Birthday with Chelsea Handler and Friends at Cowboy Bar in Wyoming

Gravity star and her best friends head to Wyoming for a country pre-birthday party.

By Mike Vulpo, Senta Scarborough Jul 28, 2014 1:39 PMTags
Sandra Bullock, Chelsea HandlerJason Merritt/Getty Images

Which celebrity celebrates part of their 50th birthday in Wyoming? Sandra Bullock, of course!

E! News can exclusively confirm the hilarious actress joined Chelsea Handler and a group of girlfriends for a pre-birthday celebration in Jackson Hole, Wyoming Thursday evening.

According to an eyewitness, Bullock and her friends entered the Million Dollar Cowboy Bar between 9 and 10 p.m. for a night of music and drinks.

"There were probably six to ten women in the group. It appeared to be a ladies night," the eyewitness tells E! News exclusively. "They just came in to listen to the band."

A country group called Southern Soul Allstars was on-hand to perform for all guests. Dianne McManus, a member of the band, was unaware the movie star was in her midst and unknowingly took a crack at her movie on stage! "The day before Sandra came in, I had just watched the movie Gravity. I had waited for a long time to see it and I am a huge fan of Sandra Bullock, but I just hated that movie, but I love her," she told E! News.

"Before I knew she was in the audience at the Million Dollar Cowboy Bar, I said on stage I hated the movie Gravity and gave it a pretty bad review, saying why would you do a movie where George Clooney died in the first 30 minutes and she didn't even kiss him?" she continued. "Obviously Sandra, who was sitting right there has a good sense of humor and is a good sport since she had to listen to me say all of that...I would have never done that if I known she was in the audience."

Ha! Well, all in all, the ladies' evening "was pretty low-key," added an eyewitness. ""They all had one drink…and were all dressed casually."

The witness added, "Sandra looked radiant, beautiful and was very sweet. It looked like she was having a blast."

Handler and Bullock have been friends for several years.

Whether attending mutual friend's birthday parties together or posing "areola to areola," the ladies certainly know how to have a good time and share a laugh.

Now the question is, could Bullock be involved with Handler's latest Instagram?

"Birthday girls," the Chelsea Lately host Instagrammed Saturday night (Bullock's actual birthday). Perhaps Wyoming was only the beginning for this birthday celebration. 

(Originally published July 27, 2014, at 6:30 p.m. PT)