Seven-year-old Iestyn Middle from Penygraig in the Rhondda is being treated for a brain tumour - and in the run up to Christmas had his presents stolen from their shed.
After hearing about his story, Cardiff City invited him along to today's game with Millwall. Before kick-off, we went along to join him and his family.
Iestyn described the size of the stadium as the most exciting part of visit so far - and predicted a 2-1 win for the Bluebirds. His dad Jonathan said the public reaction was 'overwhelming.'