Avengers director Joss Whedon has seen a sneak seven-minute peek of the upcoming Amazon/BBC series Good Omens and his reaction was pretty funny.

Coffee with @neilhimself is a delight and a balm. Getting to see 7 minutes of GOOD OMENS on his laptop, that’s like... well I’ve never tried crack but I’m gonna say crack. JUST WAIT till you see it... #GoodOmens #GreatArt #crack pic.twitter.com/Xk4Ry3jLOl

— Joss Whedon (@joss) July 9, 2018

Good Omens is based on the collaborative novel between Neil Gaiman (American Gods) and Terry Pratchett (Discworld). It follows the demon Crowley (David Tennant) and the angel Aziraphale (Michael Sheen), who, being accustomed to life on Earth, seek to prevent the coming of the Antichrist and with it the final battle between Heaven and Hell.

Also, starring in the series is Jon Hamm, Nick Offerman and Reece Shearsmith.

Gaiman is writing the series. It's the latest in a string of adaptations of the author's work which include fantasy drama American Gods, anthology series Likely Stories and sci-fi punk comedy film How to Talk to Girls at Parties.

Good Omens is scheduled to be released in 2019.