It’s a bird! It’s a plane! It’s…a diner?

The Wythe Diner, a beloved railcar eatery dating back nearly 60 years, was physically lifted from its longtime Williamsburg home , carried across Brooklyn and plopped down in the Brooklyn Navy Yard Saturday, where it will remain as a movie set for Steiner Studios’ future productions.

The cozy ’50s-style diner was gingerly lifted into the air by a crane and placed on a flatbed truck that cruised about two miles south to the Brooklyn Navy Yard. There, the retro restaurant will be installed as one of the production studio’s permanent sets.

The old-fashioned caff, which opened in 1968, already comes with a storied resume in film, including features in “Men In Black 3” and “The Good Shepherd.”

Still, the diner — which hasn’t functioned as a fully r

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