Hard at work on yet another film project, Natalie Portman was spotted plugging away on the set of her new movie “Hesher” in Los Angeles yesterday (May 15).

Natalie Portman

The “My Blueberry Nights” babe sported a pair of spectacles as she ran a few scenes, eating an ice cream cone as well as driving a car.

As for the rumors that Natalie is having a little extracurricular fun with actor Sean Penn, she says nothing could be farther from the truth.

Miss Portman told press, “Sean Pen is a friend and colleague.  The reports that we are romantically involved are completely untrue.  I normally do not respond to rumors about my private life, however, this repeatedly fabricated story has forced me to do so.”