Ed
Ed asked Andy Weir:

Matt Damon has been rumored to play the lead in the movie adaptation of "The Martian". Damon can be currently seen in "Interstellar" playing a marooned astronaut. Do you think Damon playing a similar character will hurt the box office for the movie adaptation?

Andy Weir Not just a rumor. They're filming it right now. See this question for more info on that: https://www.goodreads.com/questions/2...

I don't think Damon's role in Interstellar will have any effect on The Martian. I haven't seen Interstellar yet, but as I understand it, he was only in it for a short time.
Andy Weir
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