beckham , wife victoria and their two other sons brooklyn and cruz were there to cheer on romeo as he completed the race , raising £ 6,000 for charity .
it is the same three mile course where mo farah and triathlon champions alistair and jonny brownlee kick started their careers .
romeo wore race number 1081 and represented the kensington and chelsea region .
his family , who were all sporting matching t-shirts with ` team romeo ' emblazoned on them , posed for pictures with him at the finish near buckingham palace .