Taylor Swift revealed the lead single for her highly anticipated new album, “The Tortured Poets Department,” exactly 10 hours before the record drops.

The “Cruel Summer” singer announced that “Fortnight” — the album’s opening track featuring Post Malone — is the record’s official first single on Thursday afternoon.

“I’ve been such a huge fan of Post because of the writer he is, his musical experimentation and those melodies he creates that just stick in your head forever,” Swift wrote on Instagram. “I got to witness that magic come to life firsthand when we worked together on Fortnight.”

The 34-year-old also revealed that she and Malone, 28, would be releasing a music video for the track at 8 p.m. ET on Friday.