Scarlett Johansson's publicist says the Hollywood actress is not pregnant despite a photo making the rounds that appears to show her sporting a baby bump.

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Johansson, 26, recently divorced actor Ryan Reynolds and since has been dating 50-year-old, double Oscar winner Sean Penn.

A widely circulated photo of Johansson and Penn jogging during the weekend sparked media buzz that the actress is expecting her first child.

"Scarlett is not pregnant," her representative said in a statement issued to UsMagazine.com Tuesday.

"She's outside running and it's simply the placement of her shirt that is misleading," the statement added, referring to the bulge around Johansson's middle.

"She's been training for 'The Avengers' for over four months and is in the best shape of her life."