Watch: Brandon Flynn's Steamy New Role is a Calvin Klein Holiday Ad Campaign Teaser

Happy Holidays! "13 Reasons Why" hunk Brandon Flynn stars in Calvin Klein's Holidays ad, as well as the campaign's teasing video, promoting this year's Holiday collection.

UK newspaper the Daily Mail spilled details on the 25-second video, in which the 30-year-old actor "danced and grooved" as he moved "his sinewy body in time to the beat" and struck a number of poses – some shirtless.

People Magazine reported on the spot, and shared a number of still images from an accompanying photo shoot. The color portraits showed Flynn off in maroon undies.

"In the BTS pictures, Flynn flaunts his toned physique – including his chiseled abs – and showcases his collection of tattoos," the article added. "Basically, Flynn is the full package and the gift that keeps on giving this holiday season."

For People's feature, "Flynn, 30, reveals what's underneath his holiday-wear, including a tight pair of briefs (CK's Future Shift Holiday Low Rise Trunks to be exact) – and nothing else!" the magazine swooned.

In addition to his Calvins, "the three clothing items he wears to make him feel most like himself: Speedos, jeans and a T-shirt, and he wears the second and third together," the writeup went on to say, noting that Flynn is "a classic kinda guy when it comes to style."

The hunky actor wasn't alone. "The new spot, photographed by James Brodribb, also stars fellow ambassador Hailey Bieber, who models a rack-worth of festive outfits pulled from Calvin Klein's holiday collection, from sexy slips to a fiery red minidress," People noted.

Watch the video below and see for yourself what the fuss is about.

And for more of Brandon, check out these pics from his Instagram: