A five-year-old boy Lewis Hamilton called his spirit angel has died of cancer.
Harry Shaw passed away on Saturday but fought to the very end, his family said as a charity fundraising page saw donations climb to more than £230,000.
His pain and suffering is over, his parents said.
Formula One legend Lewis Hamilton had dedicated his win at the Spanish Grand Prix to the youngster, while Mercedes sent the trophy and one of Hamiltons cars to Harrys home in Redhill, Surrey.
It follows a ten-month battle against Ewings Sarcoma; a rare bone cancer he had been diagnosed with aged four.
It is impossible to imagine life without Harry and the hole he will leave in our lives, a statement on Twitter said.
We are SO proud of Harry and everything he achieved in his life and the legacy he has created to help others.
We miss him so much.
Harry had sent a message to Lewis Hamilton saying: Good luck wining the race in Spain and thank you for the gifts. Lots of love from Harry and goodbye.
After winning the race, Hamilton said: Today, I was just super-inspired by this kid that sent me a message.
He was my spirit angel.