It's a Darren Beaman one button peak lapel bespoke jacket.
It's on a display form and likely pinned/clamped in the back in
order to look very smooth from the front for the photograph.
It would not sit that way if a person was wearing it.
I don't know if this applies to the shirt Ben Affleck's wears in that movie, but a lot of studios source their shirt wardrobes and individual Hollywood actors get their shirts from Anto Shirtmakers in Beverly Hills.
Look under the "Film & Television" section on the Anto site. Gone Girl is there.
A good alterations tailor (not an alterationist at a dry cleaner) should be able to take the thigh in. Have the tailor pin the trousers to the desired width while you are trying them on. That's the best way to determine whether there will be any throwing off of the front crease or of the pleats.