Though Ridley Scott is well into production on his sci-fi thriller Prometheus, that hasn't stopped him from adding another well-known actor to his cast.

Patrick Wilson has come aboard this Alien spin-off, but it is not known in what capacity, or who he will be playing.

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Other cast members include Noomi Rapace, Charlize Theron, Michael Fassbender, and Idris Elba.

It is believed that Ridley Scott is shooting both an R rated and a PG-13 rated version of the script. No other story details have been released at this time.