For George Nicholson, from County Durham, the Great North Run was particularly special, he was running in memory of his granddaughter Emily, who died as a toddler.
George fundraises for Acorn, the hospice that supported his family through their loss. Because of his fundraising efforts, George was nominated to be a torchbearer, something he could not leave behind for this half marathon.
Olympic and Paralympic heroes have spoken to ITV Tyne Tees about the BUPA Great North Run and how they admire those taking part.
From Team GB to The Only Way Is Essex, celebrities are taking to Twitter to say 'good luck' to runners.
Double Olympic champion Mo Farah started the race