The Great Wall whitewashed? Twitter hits out at Matt Damon's controversial casting

Matt Damon's leading role as a soldier in ancient China fantasy adventure film The Great Wall has received a backlash on social media.

Days after the trailer for the film was released, Twitter users have mocked the casting of the white American actor.

Prominent Asian-Americans spoke out claiming Damon's prominent role was the latest example of Hollywood "whitewashing".

A series of images re-imagined scenes from Damon's Hollywood career, while others replaced him in the posters of his most celebrated roles in protest at the incongruous casting.

Others replaced Damon on the posters of some of his signature movie roles with Bollywood star Shah Rukh Khan.

Taiwanese American actor Constance Wu said on Twitter that "(excuses of) 'hero-bias' and 'it's really hard to finance' are no longer excuses for racism".

She said: “Our heroes don’t look like Matt Damon. They look like Malala. Ghandi. Mandela."

The English-language film, which is directed by Zhang Yimou, is set for release in February 2017.