Throughout the movie history of the X-Men, there have been a number of especially terrible casting decisions plaguing the Marvel heroes. The mutant heroes of the X-Men rank as some of Marvel’s most iconic figures, and their cinematic history has seen many characters adapted into live-action. Fox’s X-Men movie franchise saw many X-Men heroes and villains appear, many of whom are played by multiple actors across its different timelines.

https://screenrant.com/x-men-movies-worst-casting-actors-list/