The Prime Minster is hosting a big meeting to try and work out how to tackle world hunger.
Later today, lots of companies and charities will gather to try and raise more money to tackle hunger in some of the poorest countries on the planet.
David Cameron is hosting the meeting because the UK is president of the G8.
The G8 are a group of countries that regularly come together to try and deal with the world's problems.
As well as the UK, the US, Canada, France, Germany, Italy, Japan and Russia make up the 8.
Each country takes turns to be President for a year - and this year it's the UK's turn.
So David Cameron is using his time as leader to try and do more to tackle the lack of food in poorer countries.
The meeting is going to try and raise more money to help areas like Africa, but also try and change how food is grown and transported there.