They are calling on Universal Studios not to cast the English actor in the new production of Wicked.
More than 50-thousand people have signed a petition calling on Universal Studios to block James Corden from starring in a new musical.
The petition says the TV host and actor should not be in the production of Wicked the movie.
A film adaptation of the show, which tells an alternative tale to The Wizard Of Oz, is expected to include pop star Ariana Grande.