Despite splitting from her now-estranged husband Brad Pitt on September 15, Angelina Jolie had ditched her wedding ring back in August. Wow! Clearly, a sign of troubled times to come ...

On August 21, the Oscar winner, who is always all about her children, was shopping for her six kids at a toy store in the Beverly Center mall in Los Angeles -- and if you look closely, you can see that she was sans wedding ring that day.

This is the last time we spotted Angie, who was of course clad in all black, out in public before filing for divorce from Brad Pitt on September 19.

In addition to ditching the bling of hers for her trip to the mall, the busy mama was on the hunt for things for her brood with Brad. The 41-year-old also picked up some clothing for her children at Macy's.

A source at the mall tells X17online exclusively, “Angelina looked a little stressed, like she wasn’t necessarily enjoying herself. She was so thin it was almost shocking. She bought some clothes for the kids at Macy’s and then went to a toy store and bought some art kits. She definitely wasn’t wearing her wedding ring!”

Usually Angelina is spotted out and about with her kids, an assistant or a nanny -- but on this day, the A-lister was alone and and looking somber. Aww! This makes us so sad!