Arnold Schwarzenegger was rocking very merry festive vibes — and sleighing it on the set of his new film, “The Man with the Bag.”

The film legend was noticed in full vacation mode — sporting a Christmas jumper, snow-white hair and beard, strolling to his NYC trailer just like the jolly outdated St. Nick he’s taking part in within the film.

Arnold was virtually incognito … he may’ve been any random man strolling the streets of NYC. If not for the crew and cameras, you’d assume he was simply one other vacation shopper on an informal stroll!

Arnold’s teaming up with Alan Ritchson within the film, which facilities on Santa’s magic bag getting swiped, forcing him to show to his naughty record’s high thief to avoid wasting Christmas.

This festive flick is shaping as much as be a ho-ho-ho vacation hit! And it’s not Arnold’s first time within the Christmas film recreation — he’s been decking the halls since “Jingle All of the Manner” again in 1996 … an Xmas basic!