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Also donning a striped tank top, the "Star Wars" sweetheart gave a little smile to the paparazzi as she loaded into her car and drove away.

Natalie's workout session comes just after a report broke indicating the 27-year-old actress was spotted smooching her elder fellow thespian Sean Penn.

Taking place at the Sunset Tower Hotel on March 17th, an onlooker tells, “They went to a bank of elevators that only goes to the spa or to private rooms. They came back about 45 minutes later, and that’s when I saw them making out.”

The source continued, “There’s a door outside of the hotel’s Tower Bar that has a bridge to the terrace, so it’s semi-private. I used that path to get to the restroom, and when I came back, I had to go through some curtains — and that’s when I interrupted Sean and Natalie! When they saw me, they were startled and quickly composed themselves.”