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Continuity mistake: After Beast hits Magneto with the four needles, they change place.

Dr Wilson

Continuity mistake: When Magneto and Charles Xavier are in Jean Grey's house (when she is older and making everything around her float in the air), watch the book shelf when it falls down. At least 25 books fall out of the top shelf and in the next few shots you see that the number of books fallen has minimized greatly. (00:45:00)

Other mistake: In the end credits, the job of paint foreman is misspelled as 'forman'. (01:41:50)

ployp

Trivia: Longtime X-Men writer Chris Claremont appears with a lawnmower in the Grey's neighborhood at the beginning of the film. (00:02:50)