From GMM

Phil Hill, the only U.S.-born formula one world champion, on Thursday died in California at the age of 81.

Born in Florida, he won the drivers' title in 1961 for Ferrari, and three career grands prix.

"Phil and I have always kept in touch throughout the years and I know I will miss his passion and love for Ferrari very much," said the Italian marque's president Luca di Montezemolo.

America's only other world champion, Mario Andretti, was born in Italy.

Phil Hill, who retired from Formula 1 in 1966, reportedly died in hospital of complications from Parkinson's disease.

He is survived by wife Alma, son and former F3000 racer Derek, daughter Vanessa, stepdaughter Jennifer and four grandchildren.