Chris Farley As The Voice Of Shrek In "Shrek" Movies, Replaced By Mike Myers
Chris Farley, a veteran of Saturday Night Live, was recruited to voice the title character in the 1995 film Shrek. Sadly, Farley passed away in 1997. Farley's rendition got left abandoned in favor of fellow SNL veteran Mike Myers. Myers insisted on using his distinctive Scottish accent for the role.
Also, how would anyone be able to tell when some background character in GoT was replaced? There were a ton of them, and they all looked the same.