A petition is calling for producers of a film about Rumi to look for someone else other than Leonardo DiCaprio to play the famed Persian poet.
Screenwriters David Franzoni and Stephen Joel Brown recently said they were looking to cast DiCaprio in the role, although he hasn't yet signed on to the film.
But the petition calls the suggestion "ludicrous and offensive" and asks producers to cast "a Middle Eastern actor as Rumi to truly challenge the Hollywood stereotypes".
"Casting Leonardo DiCaprio as Rumi rewrites history, takes possession of Muslim accomplishments, and gives the credit to a white man," the petition claims.
"Now, when people think of Rumi, they'll picture him with pale skin, blond hair, and blue eyes."
The petition has more than 5000 signatures, and the hashtag '#RumiWasntWhite' has been trending on Twitter.
It comes as New Zealand-based movie Ghost in the Shell faced criticism for casting Scarlett Johansson as a character many thought should have been played by an Asian actress.
Producers on the blockbuster Gods of Egypt were forced to apologise for failing to put together a "more diverse" cast on the film.