The original cast and crew of L'Exorciste (1973) were very much opposed to a sequel. William Friedkin and William Peter Blatty actually met to discuss ideas at one point, but when they failed to develop a suitable premise, they abandoned the project. Both Linda Blair and Ellen Burstyn turned down repeated offers by the studio, though Blair eventually agreed to return when presented with what she considered a good script. However, according to Blair, due to various rewrites the script ended up a total mess. By that point, however, she was contractually bound to a sequel, and unable to drop out of the project.
Linda Blair refused to be subjected to the makeup she wore in the first film. In flashback scenes, the possessed Regan was played by a double.
In a 2005 interview, Sir John Boorman remarked: "It all comes down to audience expectations. The film that I made, I saw as a kind of riposte to the ugliness and darkness of L'Exorciste (1973) - I wanted a film about journeys that was positive, about good, essentially. And I think that audiences, in hindsight, were right. I denied them what they wanted and they were pissed off about it - quite rightly, I knew I wasn't giving them what they wanted and it was a really foolish choice. The film itself, I think, is an interesting one - there's some good work in it - but when they came to me with it I told John Calley, who was running Warner Bros. then, that I didn't want it. "Look," I said, "I have daughters, I don't want to make a film about torturing a child," which is how I saw the original film. But then I read a three-page treatment for a sequel written by a man named William Goodhart and I was really intrigued by it because it was about goodness. I saw it then as a chance to film a riposte to the first picture. But it had one of the most disastrous openings ever - there were riots! And we recut the actual prints in the theatres, about six a day, but it didn't help of course and I couldn't bear to talk about it, or look at it, for years."
Linda Blair has said that Richard Burton started out sober, but frequently became drunk during the middle and end of filming. She also says that tensions were high among the cast.