Continuity: The 3 main characters are having dinner with Anne Bancroft. You can see Jenna Elfman's dark roots. After she and Ben Stiller go home the roots are light. Did she stop to get her hair touched-up on the way home?
Great sites
Mistakes
The two men are talking on the street while waiting to cross the street. Watch the kids around them. The two girls on the left bottom look right at the camera. Another girl towards the mid-right, is just mumbling out words. If you look at her lips, you can tell that those are not words. See more...
Trivia
When Milos Forman, who plays Father Havel, talks to Edward Norton about faith in the private quarters of the church he tells Norton that he came to America when the Russians invaded Czechoslovakia. He actually did so in real life. See more...
Keeping the Faith mistakes
Continuity: In the scene in the karaoke shop, watch the light through the window. Sometimes it's daylight outside, sometimes it's dark.
Revealing: In the shot where Ben Stiller and Jenna Elfman are in the hallway kissing goodbye, it's obvious that Ben Stiller is standing on something to make him the same height as Jenna Elfman, who is much taller than him in real life.
Keeping the Faith trivia
When Milos Forman, who plays Father Havel, talks to Edward Norton about faith in the private quarters of the church he tells Norton that he came to America when the Russians invaded Czechoslovakia. He actually did so in real life.