Malala Yousafzai, the teenager who made a miraculous recovery after being shot in the head by the Taliban, praised efforts made by Nigerian campaigners to raise awareness around the abduction of more than 200 girls by Islamist militant group Boko Haram.
Speaking during a visit to the country, Malala said: "We thank you so much for telling the world that this is happening here, not only just knowing but also to tell the world that they stand up with you".
More top news
The Government has previously described the new coin - which enters circulation tomorrow - as "harder to counterfeit than ever before".
The European bloc said that Russia should release hundreds of people it arrested at anti-government protests and rallies.
The singer was coy on which role he would be taking up, going only so far as to say he would not play a stormtrooper.