Goofs:
Revealing mistakes: In the exorcism scene when Regan vomits for the second time, the priest turns her head so that the vomit deposits on a sash. When the head is turns it exposes the edge of the mask used to cover the flattened tubes used to pump the "vomit" to the mouth (more)

Trivia:
Geraldine Page turned down the role of the mother that went to Ellen Burstyn. (more)

Filming Locations:
3600 Prospect Avenue, Georgetown, Washington, District of Columbia, USA (more)

Quotes:
Chris MacNeil: We've got rats in the attic. You better get some traps.
Karl: Rats?
Chris MacNeil: Mm-hmm. 'Fraid so.
Karl: But the attic is clean.
Chris MacNeil: Alright, then we've got clean rats.
(more)

Awards:
Won 2 Oscars. Another 12 wins & 14 nominations (more)