Ethnic minority actors do feature, but in secondary roles (Ben Kingsley as Nun, Golshifteh Farahani as Nefertari and Indira Varma as Miriam, for example).
Scott addressed his critics last August by assuring film fans that Exodus would represent "a confluence of cultures".
"There are many different theories about the ethnicity of the Egyptian people and we had a lot of discussions about how to best represent the culture," he told Yahoo.
"We cast major actors from different ethnicities to reflect the diversity of culture, from Iranians to Spaniards to Arabs."
Edgerton also responded to complaints, acknowledging the "whitewashing" accusations as fair. "It's not my job to make those decisions, he told SBS. "I got asked to do a job and it would have been very hard to say no to that job. But I do say that I am sensitive to it and I do, I do understand and empathise with that position."
However, a protest was soon launched on Twitter urging cinema-goers to #BoycottExodusMovie.
Scott's film is not the only one to come under fire for its allegedly racist casting. Upcoming Warner Bros movie Pan has been criticised for casting white actress Rooney Mara in the role of Native American princess Tiger Lily.
The Hollywood Diversity Report, published earlier this year showed that only 11 per cent of films cast an ethnic minority actor in a lead role while ethnic minority actors made up just 10 per cent of the cast in the majority of movies.