William Davies (sometimes credited William Davis or Will Davies) is an English screenwriter and film producer. He has written and co-written a number of films including Twins (1988), The Real McCoy (1993), Johnny English (2003), Alien Autopsy (2006), Flushed Away (2006), How to Train Your Dragon (2010), Johnny English Reborn (2011), Puss in Boots (2011) and Johnny English Strikes Again (2018). The British-born Davies is a graduate of Mercersburg Academy and Cambridge University. He is the brother of television producer Michael Davies and the opera singer Rebecca de Pont Davies.