Jessica Chastain has been nominated for a slew of awards thanks to her role as the CIA operative who hunted down Osama bin Laden in Zero Dark Thirty. Just don’t ask her to talk about it.

The Golden Globe nominee stopped by to chat with David Letterman last night, and he grilled her on whether or not the film portrays its subject accurately. “I’m afraid to be called in front of a senate committee!” she laughed as she tried to avoid answering as much of the question as possible.

Jessica diplomatically answered that his questions were better directed at screenwriter Mark Boal, who did the hard investigative work and spoke with the real-life CIA agent her character is based on. (She’s still undercover.)

David kept joking around with Jessica about the film’s sensitive subject matter, and jokingly tried to get her to reveal the identity of the agent, prompting Jessica to ask, “Am I going to prison?”

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But David did manage to get something of a straight answer out of her regarding how careful the filmmakers were in portraying the truth. “In my opinion, this is a very accurate film,” she finally said, when pressed, but added: “I think it’s important to know that the film’s not a documentary.”

Fortunately, no SWAT teams swarmed in to whisk Jessica off to a maximum-security prison on a remote island before the interview was done.

How do you think Jessica did at keeping her cool under pressure?