Bérénice Bejo gave an interview to Argentinian “The Nation” and gave a little info about Rob’s character.  The plot thickens.

Translation by Google:

“Did you feel the need to seek stronger characters?

…. And the next thing I do is another strong film with the character of a mother whose son is very particular, a little awkward and weird. Over the scenes you’re realizing that it is not a normal guy, he’ll become a monster or something. And it is about the relationship with the mother and father. So good, I read, I liked that I was given a role as well, and I’m going to do. I was lucky to do very different things.

‘And in Hollywood? I guess after your Oscar nomination in 2012 for The Artist, should many proposals to work in the United States have arrived.

A Michel reached him many scripts. I already had two films to make and was not available for two years. And now that I told you that I do, is an American film, a debut, with Tim Roth, that will make my husband, and Robert Pattison [sic], the character of a family friend.”

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