Homeland star David Harewood insisted that "there can be enough food for everyone". Speaking at today's rally he added:
"We've already changed the diaries of the G8 leaders, we've already changed their agenda. Now we just need to remind them they need to change the world. That's why we need all of you to speak up today."
More top news
Researchers believe they have found the wreckage of British explorer James Cook's ship "Endeavour".
Four kittens have been rescued from a fire by emergency services in California, USA.
A mother died after trying to save her three-year-old son when he fell down a cliff during a family hike.