NEW ORLEANS — Six weeks in the Crescent City and Chris Pratt has not let one drop of gumbo, one morsel of po’boy, or one crumb of beignet pass his lips.

In itself, this admission would be enough to raise the pitying eyebrow of anyone who has been bewitched by New Orleans cuisine.

But coming from Mr. Pratt, an actor who has physically oscillated from puffy to shredded and back again, it also packs surprise. As anyone familiar with Mr. Pratt, best known for his role as the meatheady Andy Dwyer on the NBC sitcom “Parks and Recreation,” can attest, he is not a man who readily avoids food.

But in the last year, Mr. Pratt, 35, has risen beyond Andydom to leading-men roles — the first in “Guardians of the Galaxy,” based on the Marvel comic and set for release next week, and the second in “Jurassic World,” which was in production this summer in New Orleans. “Guardians” required that he get into action-figure shape, and “Jurassic” meant he had to more or less keep it, which in turn meant swearing off rich local fare.