Former porn star Mia Khalifa has revealed she was forced to quit after receiving death threats from Islamic State (IS, also known as ISIS).

The 25-year-old Lebanese-American became one of the top performers on Pornhub - but her work led to condemnation from conservative religious leaders in the Middle East.

In one of her most famous adult films, she wears a hijab while having sex with a male actor and an older hijab-wearing actress, who's acting as Khalifa's stepmother.