Scott recently commented on a few details of Prometheus regarding its run-time and his director's cut. Although he's known for his support of director's cut releases on DVD/Blu-ray he said that:

"The cut that you're gonna see in cinemas... it is always the director's cut, really."

"I've only made a mistake once on cutting a film short — I won't say what it is right now, because this is not the time — but I removed 17 minutes off a movie, and I didn’t ruin it, but it wasn't [as effective]. In this instance, you got a pretty good version here, pretty good cut. We're running at about — I think without the end titles, which normally run about four to five minutes — we're running one hour, fifty-nine minutes and change. It's very tight, it's what it should be."


Original Source is here