This cute footage shows a little boy high-fiving London Marathon runners.<br /><br />Jonah Azevedo-Casella, four, watched Sunday's event with his mum Michela Casella, 39.<br /><br />She says he spent an impressive half an hour holding out his hand for participants.<br /><br />Michela, who filmed the wholesome moment, said: "We live on a road in Charlton where the London Marathon passes every year, and as always, we go out in front of the house to cheer on the runners.<br /><br />"My sons love watching the runners and spotting all the funny costumes.<br /><br />"And they love giving high-fives as a way to cheer and encourage them."
