Neil Gaiman plans to write a six-part television series based on "Good Omens," the acclaimed 1990 fantasy novel he co-authored with the late Terry Pratchett.

The Guardian reports Gaiman made the announcement Thursday in London at a memorial event for Pratchett, who passed away in March 2015. Although Gaiman had previously declined to adapt the novel, explaining, “Terry and I had a deal that we would only work on 'Good Omens' things together,” Pratchett left a letter posthumously, giving his blessing to his friend to write the series himself.

"Good Omens" or, more fully, "Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch," is a comedic take of the coming of the apocalypse. It centers on the angel Aziraphale and the demon Crowley, who attempt to short-circuit the End Times, and the Antichrist who, because of a mixup at the hospital, is a seemingly normal boy raised by English parents.

Terry Gilliam had hoped to adapt "Good Omens" for the big screen as far back as 2002, and in 2011 it was announced Terry Jones and Terry Jones would instead produce a television version. Of course, neither of those materialized. BBC Radio 4 did at last adapt the novel in 2014, with Gaiman and Pratchett appearing in cameos.