Alex Garland(I)

According to Karl Urban, besides writing the script, he was the one who effectively directed Dredd (2012) and not credited director Pete Travis, who was ultimately sidelined.

It slightly depends on your perspective, sort of how you look at these things, but when I sit down to write a script, I'm not planning to write a script; I'm planning to make a film, and so I only see the script as being just a step there.