Jennifer Aniston showed off quite the rock while out with fiancé Justin Theroux in Santa Fe on Saturday.
Theroux was visiting the actress – who's currently filming We Are the Millers in New Mexico – when Aniston, 43, reached up to touch his face, baring the bauble.
The couple were engaged Aug. 10 after dating for more than a year.
"Everyone is really excited for them," a source told PEOPLE at the time.
"It's amazing to see how happy Justin makes Jen, and everyone was always hoping that he would propose."