This isn't confirmed and the wording is confusing but it seems as though Viggo's not doing it:
Guy Pearce Hits The Road
Source:
ShockTillYouDrop.com October 31, 2007
© 1998 - 2007 Coming Soon Media
Last month, it was reported that producers of John Hillcoat's The Road were eyeing Viggo Mortensen ("The Lord of the Rings" trilogy) to star, and now ShockTillYouDrop.com has learned that Guy Pearce has joined the pic.
In the film, a father and son traverse a post-apocalyptic America facing wackos and cannibals. "Road" is based on the novel by Cormac McCarthy. Joe Penhall is adapting.
Hillcoat also directed The Proposition which starred Pearce.
filmstalker.com Viggo Mortensen was being rumoured to be heading up John Hillcoat's adaptation of the Cormac McCarthy novel The Road, however the word is that it's not going to be Mortensen after all but Guy Pearce.
The novel tells the story of a father and son who make a journey through the post-apocalyptic wasteland to get to the coast where they think it will be safe, all the while trying not to get caught be the surviving humans who are now crazy and/or cannibals.
John Hillcoat will direct the Joe Penhall for Cormac McCarthy's novel The Road (Amazon.co.uk / Amazon.com).
We did hear the rumour that Viggo Mortensen was up for the lead role of the father, now though we hear from Shock Till You Drop through Coming Soon that it's going to be Guy Pearce, although no source is given.
It's difficult to say how this will turn out, but John Hillcoat and Guy Pearce suggest something strong, and rather bleak, since they both worked on The Proposition together.