I can't tell whether Kristen Stewart is beaming because of the potent vitamin high from that green shake, or because she is back on set doing what she does best.
By that, of course, I mean acting. Although the 23-year-old actress is practicing her smile game with shocking regularity, she isn't quite an expert in that field yet!
KStew was snapped on the New York set of Still Alice and it is clear that the self confessed workaholic was absolutely delighted to be exercising her acting muscles again.
It certainly wouldn't have been the subject matter of the movie that had Stewart smiling. Still Alice, which also stars Julianne Moore, Kate Bosworth and Alec Baldwin, is definitely not a lighthearted frolic.
The movie, which is due for release in 2015, follows a psychology professor's descent into early onset Alzheimers disease and how it gradually erodes her independence.
Whereas the storyline is undeniably hard hitting, it is refreshing to see Kristen back in her element and highlighting a difficult, often misunderstood disease.
Stewart has a staggering 9 movies due out over the 2014-2015 period so let's hope she manages to maintain her enthusiasm through the inevitably gruelling months to come.
Which upcoming KStew flick are you guys most excited about? Have a little click on the poll below and let me know!
(Source: E! Online)