Jake Gyllenhaal and Robert Downey Jr. will star in David Fincher's Zodiac.
The movie tells the true story of serial killer Zodiac responsible for at least 37 murders around San Francisco in the 1960s and 70s, featuring the pair as the reporters working for the San Francisco Chronicle, the newspaper which the killer used to communicate with the authorities.
Mark Ruffalo is likely to play the inspector in control of the Zodiac case.





