God Bless Her Most Magnificent Maj
Here in Windsor the news is starting to trickle through.
The town, which is normally full of tourists, is quieter as it's been raining all afternoon.
But some of those who have ventured out to visit Windsor castle - the Queen's main residence - said they found out about the Queen's condition after overhearing castle staff talking about it.
Others found out as they left the grounds.
Some people from outside Windsor have also started travelling to this royal town.
One woman I spoke to had travelled from west London. She said after hearing the news, she wanted to be in Windsor.
Queen Elizabeth II: Royal Family gathers at Balmoral amid concerns for Queen's health - BBC News