The actress, 45, showed off a darker new do, a fresh face and a big grin on Friday at the Living Proof Style Lab in Boston.
Although she's recently gone back and forth with hair extensions since initially chopping her locks, the color change is something different for the star, who has been going to the same hairstylist, Chris McMillan, for years.
"I don't know, man. I did it!" she said of her bob last year.
"I feel great. I feel lighter. It's simple, it's really simple, that's for sure. But I'm always one of those girls who does a big old chop just to get it really healthy, to repair all the [damage from] hair coloring and stuff like that."
Tell us, do you like Aniston's darker 'do?