Which Discworld novels by Sir Terry Pratchett have been made into films?

The Hogfather, The Colour of Magic/The Light Fantastic as the Colour of Magic on screen and Going Postal all done as Sky TV productions.

You have also had Wyrd Sisters and Soul Music made as animations by Cosgrove Hall in 1996.

Non-Discworld novels made for screen have been Truckers made by Cosgrove Hall as a stop motion animation in 1992, Johnny and the Dead made by ITV in 1995 as a TV serial. Johnny and the Bomb was made by BBC1 in 2006 as a three part adaption.