Jack Antonoff has called the success of 'The Tortured Poets Department' "wild".

The Bleachers frontman produced Taylor Swift's latest album and admitted he is still in shock at how well-received the album has been.

Speaking on the 'Today' show, Jack, 40, said: "It’s wild... crazy".

Jack produced Sabrina Carpenter's latest single 'Please Please Please' and called both singers "the best".

Jack also admitted he is a workaholic and and said he loves everything about making music.

He explained: "I work not very far away, I work at a studio called Electric Lady and I’m up at the roof — it’s sort of like a little bit of a small apartment up there," . We make all the records up there and when lots of people hear them, it feels amazing because we’re sort of contained up there.

"You don’t hear a lot of great songs about like, one’s lunch order. So the things you don’t really understand and cause you pain are usually things worth writing about."

Meanwhile, Jack previously revealed he was “overwhelmed” by the reaction to ‘The Tortured Poets Department’, which he co-produced with The National's Aaron Dessner and Taylor.

On X, he posted: “[I] love this album more than I can say .... love you all very much ... more later very overwhelmed ... love you Taylor [sic].”

In two separate posts, Jack - who is credited as a co-writer on several songs - appeared to highlight two tracks on the album, writing “!! FOTS heads lets go !!”, seemingly referencing the song ‘Fresh Out The Slammer’, as well as stating “Down bad heads as well”, referring to the track ‘Down Bad’.

After dropping ‘The Tortured Poets Department’, Taylor shocked her fans by revealing the record was a “secret double album”, adding another 15 songs as 'The Anthology'.

She posted on social media: "It’s a 2am surprise: ‘The Tortured Poets Department’ is a secret DOUBLE album.

“I’d written so much tortured poetry in the past 2 years and wanted to share it all with you, so here’s the second instalment of ‘TTPD: The Anthology’. 15 extra songs. And now the story isn’t mine anymore … it’s all yours.”