You can spot a marathon hero from a mile away...
Are you Running in the Marathon this weekend?
If you are running in the marathon this weekend Jamie and Harriet would love to be able to call you on Friday morning to wish you good luck!
Every year at The London Marathon there are fundraisers in fancy dress, or doing something different to earn extra cash for their chosen charity.
Over the years we've seen a group of M&Ms, a runner dressed as Big Ben, a Darlek and many more.
So for tomorrow's show Jamie & Harriet would like to hear from you if you're running and raising cash for charity!
Are you running the marathon?
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For the second year in a row Katie is forced to abandon her race due to a knee problem.
Will Young says he's determined to complete the race despite suffering a knee injury.