Mercedes have confirmed that 18-year-old Kimi Antonelli will replace Lewis Hamilton for the 2025 Formula 1 season. 

Antonelli, who made his debut in practice at the Italian Grand Prix on Friday, will join George Russell on the grid next year and has signed a one-year contract.

The teenager's first appearance on track, however, was overshadowed after a crash in the early stages of the session halted a positive start at Monza.

He will become the third youngest F1 driver of all-time when he makes his competitive debut at the season-opener in Australia next March at 18 years and 203 days old, with only Max Verstappen and Lance Stroll younger in their first starts.

Antonelli was linked with a potential move to Williams to replace Logan Sargeant for the remainder of the 2024 season, but will continue the rest of his Formula 2 campaign with Prema racing. 

“It is an amazing feeling to be announced as a Mercedes works driver alongside George for 2025,” said Antonelli.

“Reaching F1 is a dream I’ve had since I was a small boy; I want to thank the team for the support they’ve given me in my career so far and the faith they’ve shown in me.

"I am still learning a lot, but I feel ready for the opportunity. I will be focused on getting better and delivering the best possible results for the team."

Mercedes team principal Toto Wolff said: “Our 2025 driver line-up combines experience, talent, youth and out-and-out raw speed.

"We are excited about what George and Kimi bring to the team both as individual drivers, but also as a partnership.

“Our new line-up is perfect to open the next chapter in our story. It is also a testament to the strength of our junior programme and our belief in home-grown talent.

“George has proved that he is one of the very best drivers in the world. He is not only fast, consistent, and determined, but has also developed into a strong leader.

“Kimi has consistently shown the talent and speed needed to compete at the very top of our sport.

"We know it will be another big step up, but he has impressed us in his F1 testing this year and we will be supporting him every step of the way."