(Reuters) - Seven-times world champion Lewis Hamilton, Formula One's most successful driver of all time, arrived for his first day at Ferrari on Monday, and said it was a dream come true to race for the Italian team.

Almost a year since Hamilton announced his shock decision to leave Mercedes, where he won six of his seven Formula One world championships, for Ferrari, the 40-year-old is at the team's headquarters at Maranello for his first official day.