Actor and director Ben Affleck will have a very unusual role on US television next week.

Reuters reports that Affleck has travelled to eastern Congo to report for the ABC news programme 'Nightline'.

Writing on the ABC website, Affleck said that he wanted to draw attention to the starvation, violence and disease people face there.

He said: "It makes sense to be sceptical about celebrity activism. There is always the suspicion that involvement with a cause may be doing more good for the spokesman than he or she is doing for the cause."

But the star said he hoped viewers could separate his involvement from "what is unimpeachably important about this segment: the plight of eastern Congo".

Affleck approached the show about doing the report.