The soldier was killed as a result of enemy fire while on a patrol in the area of Kakaran, north east of Lashkar Gah.
Despite receiving immediate medical attention, he died from his injuries at the scene, the MoD said.
More top news
The 83-year-old, best known for his role in the Oscar-winning film Doctor Zhivago is being cared for by his son, his agent said.
Two FA Cup final ticket will be blasted into space tomorrow, giving some lucky fans (or passing aliens) the chance to go to Wembley.
Two Danish radio hosts killed a rabbit with a bicycle pump live on air in a bid to highlight the "hypocrisy" of animal welfare campaigners.