(Image source from: Sandra Bullock has a low-key 50th celebration})

'Gravity' star Sandra Bullock turned 50 on Saturday. And guess where and with whom she brought in her big 50? Well, the actress hit Wyoming along with her gal pals including Chelsea Handler to have her birthday blast.

Pre-birthday celebrations kicked off in Jackson Hole on Thursday where the ladies thronged to enjoy country music by Southern Soul Allstars.

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."

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.

AW: Suchorita Choudhury