The Queen has arrived to give her name to the largest warship built in the UK at a ceremony in Fife's Rosyth dockyard.
She will smash a bottle of whisky on the hull of the 65,000-tonne HMS Queen Elizabeth - the first of two new Royal Navy aircraft carriers being built.
She is with the Duke of Edinburgh at the naming ceremony, a naval tradition dating back thousands of years.
PM David Cameron said it was a "very proud day" for Scotland and the UK.
First Minister Alex Salmond, former prime minister Gordon Brown and Chancellor George Osborne are also attending.
Six shipyards in the UK including Tyne, Rosyth and Appledore have been involved in building parts of the carrier.
BBC News - Queen naming new Royal Navy aircraft carrier in Rosyth