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Kristen Stewart

Zelig Shaul/ACE/INFphoto.com

It looks like Kristen Stewart is happy to be back at work.

The 23-year-old actress stepped out on the NYC set of her new movie Still Alice earlier today grinning from ear to ear.

Bundled up in two shirts and a black denim jacket paired with red pants, sneakers and dark sunglasses, K.Stew was snapped arriving to set while carrying a backpack. Stewart was all smiles while walking down the Big Apple street as she munched on an Apple and sipped on a green juice.

Kristen Stewart

Zelig Shaul/ACE/INFphoto.com

Still Alice, which also stars Julianne Moore, Alec Baldwin and Kate Bosworth, tells the story of a psychologist who discovers that she's suffering from an early onset of Alzheimer's disease.

Meanwhile, in addition to acting, Stewart recently tried her hand at directing by taking charge of her pal's new music video. Just the other week, the Twilight star was in Nashville making her directorial debut on a music video for her BFF Sage's band, Sage + the Saints.

"Kristen has always wanted to direct, and no better person to do that for than Sage," a source told E! News the other week.