Formula One star Lewis Hamilton kept his Ferrari move so closely guarded that he didn’t even tell his parents until the day it was announced.

The British driver rocked the F1 world when it was announced on February 1 that he was joining the Italian manufacturer next year, despite signing a new contract with Mercedes last summer.

“I didn’t speak to anybody. I didn’t tell my parents till the day of it being announced. So, no one knew,” Hamilton told a BBC podcast. “I really wanted to do it for myself. Ultimately, I had to find out what would be the best for me.”

It then emerged that the two-year deal penned with Mercedes and announced last August was actually for one year with an option for a second year, which Hamilton did not take.

Hamilton informed Mercedes team principal Toto Wolff of his decision to leave only the day before over breakfast at Wolff’s home. They have become close friends over the years after Hamilton joined Mercedes from McLaren in 2013.

The 39-year-old Hamilton and Michael Schumacher have a record seven F1 titles each, and Hamilton is the outright leader with 103 race wins and 104 pole positions.

Hamilton has spoken in the past of the lure of racing with Ferrari, where Schumacher won five of his world titles.

“The opportunity just popped up and I was like, OK, I’ve got to think for a second,’” Hamilton said. “(But) I didn’t have a lot of time to think and I had to just go with my gut feeling and I decided to take the opportunity.”