Lewis Hamilton, Formula One’s most successful driver of all time, has arrived for his first day at Ferrari headquarters in Maranello, Italy, and says it is 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, the 40-year-old suited up on Monday for a photograph in front of team founder Enzo Ferrari’s office, standing next to a Ferrari supercar.

“There are some days that you know you’ll remember forever, and today, my first as a Ferrari driver, is one of those days,” Hamilton wrote on Instagram.