Jack Antonoff posted photos capturing Taylor Swift recording her new album, “The Tortured Poets Department.”jackantonoff/Instagram

Jack Antonoff shared a rare glimpse of Taylor Swift’s musical process by posting behind-the-scenes photos of the singer recording her newly released album, “The Tortured Poets Department.”

“TTPD is here,” the music producer wrote on Instagram Friday along with several snaps of the pop superstar in the studio.

Antonoff called Swift’s 11th studio album his “favorite” of their many collaborations over the years, adding that they made it “in the most wild unhinged moment.”

Antonoff said that “TTPD” was his favorite project he’s ever done with Swift.jackantonoff/Instagram

He shared photos of Swift and Florence Welch recording their song, “Florida!!!”jackantonoff/Instagram

“all the pain distilled in this album and all the laughter that came out of it. will hold those days in the studio forever as the most inspiring of my life,” he added. “i adore this album and the way it came together. ttpd FOREVER.”

In one Polaroid, Swift, 34, was seen holding her phone as she reclined on a couch with a sassy expression on her face. Antonoff, 40, explained that the snap was taken the day they created the song “Down Bad.”

Another image captured Swift wearing headphones while singing into a recording microphone next to a large floral arrangement. Antonoff said the image was from “fots day,” referring to the track “Fresh Out the Slammer.”

The music producer also shared a snap of Swift with audio engineer Laura Sisk.jackantonoff/Instagram

He gave an inside look at the recording studio where they made the album.jackantonoff/Instagram

Antonoff posted a hilarious photo of the singer wearing his glasses.jackantonoff/Instagram
Several snaps showed Swift and Florence + The Machine’s lead vocalist, Florence Welch, smiling and hugging while working on their song, “Florida!!!”

Antonoff also posted a photo of Swift sitting on audio engineer Laura Sisk’s lap as they worked together in the studio.

Swift’s highly anticipated album debuted Friday.Instagram/@taylorswift/Beth Garrabrant

“Will hold those days in the studio forever as the most inspiring of my life,” Antonoff said.BETH GARRABRANT

The Bleachers musician additionally included a short video clip of Swift recording her song “The Black Dog” while dressed in a casual white T-shirt.

Antonoff also shared a photo of a blue drum set inside a room at Electric Lady Studios, honoring the iconic recording studio in New York City’s Greenwich Village where they recorded “TTPD.”

He concluded the carousel of snaps with a picture of Swift wearing his distinct round-framed glasses.

Antonoff has 10 songwriting and 16 production credits on Swift’s new album.Getty Images for The Recording Academy

They started working together in 2013.Getty Images for NARAS

“i love you taylor!” the former Fun member wrote.

Antonoff first collaborated with Swift on her 2013 song “Sweeter Than Fiction.” He has since worked with her on every one of her albums since 2014’s “1989,” as well as four of her “Taylor’s Version” re-records.

On Swift’s newest album, Antonoff has 16 production credits and 10 songwriting credits.