SCARLETT DOMINATRIX

Scarlett Johansson's dirty little secret…

She's set to star in Amazon  - a "gladiatrix" flick who takes on an army in 200 B.C. after her country is laid waste and she's scared she can't pull it off.

"I'm supposed to be a gladiatrix," sexy Scarlett confessed. "These film guys are crazy about gladiatrixes. But do I fit? I'm a Danish/Jewish girl from New York.

"I've done weapons training. I've fired all kinds of guns; 9mm semi-automatics, machine guns, shotguns. I've jumped off a 60-foot building. I learnt to ride for The Horse Whisperer.

"But I've never done a full-on action role," she admitted.

"I guess I'm still waiting for my Cirque du Soleil moment."

That's something you didn't do for Woody Allen, Scar Jo!