The former Friends actress was snapped on the set of her new movie Cake sporting baggy clothing, a newly-brunette bob and no make-up.
Hollywood favourite Jen, 45, stars alongside Avatar actor Sam Worthington, 37, in the upcoming flick, which is not about cupcakes, bakeries or anything sweet.
The independent film will see Jennifer play a mother who becomes fascinated by the suicide of another woman in her chronic pain support group.
Jennifer is also producing the movie.
"It's almost more interesting," she told The AP of producing. "I think there's something so wonderful about being part of the process from the seed of the idea to seeing it come to life on a screen, and to have a hand in that creatively, not just showing up as an actor for hire."
We haven't seen Jennifer on our screens since last year's roadtrip comedy We're The Millers. Her next release will be the comedy sequel Horrible Bosses 2, which hits UK cinemas in November this year.
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