Ghost Town writer/director David Koepp says he regrets casting British star Ricky Gervais - because he is relatively unknown in the U.S.
He says, "The risk isn't whether people will like Ricky or not, it's whether we can get enough people who have heard of him to go to the movie.
"In England, I don't think we'll have that problem. But in the United States his shows The Office and Extras are only somewhat known. Ricky isn't an American star."
You can see Koepp talking to Vanity Fair in another interview here.