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Jennifer Garner has no problem dressing down when playing mom to her two daughters, Violet and Seraphina. But when the 38-year-old actress is back in work mode, watch out ... the girl can look fierce!

The sexy star, wearing a simple grey dress, took a breather while on the New York set of her upcoming movie, Arthur. We can't wait to see Jen and co-star Russell Brand make magic on the screen together!

Looks like Jen is trying to put those pregnancy rumors to rest with that form-fitting frock. But is that a little bump we see? Maybe she and Ben are trying for that little boy.

What a beauty!