In a surprise announcement, Taylor Swift revealed that she will be releasing a new album at midnight ET tonight called “Evermore,” which she described as a “sister” album to her latest release, “Folklore.” A video for a new song from the album called “Willow” will arrive along with the album — Swift will be logging into the YouTube premiere page at midnight to answer questions.

The album continues the working relationships from “Folklore,” which was cowritten and coproduced with Jack Antonoff and the National’s Aaron Dessner, and also includes a contribution from “WB,” William Broad, a pseudonym that she recently revealed is her boyfriend, British actor Joe Alwyn. According to the tracklist that Swift posted, it also includes a collaboration with Haim called “No Body, No Crime”; a second duet with Bon Iver (who sang on the “Folklore” song “Exile”) on the title track; and a song with the National as her backing band called “Coney Island.”

The announcement comes as a surprise even to insiders: While Swift has said in recent interviews that she’s been writing, there was no suggestion that a new album was in the works, let alone weeks away from release.