Formula 3 youngster Lance Stroll has joined Williams' driver development scheme, ending the Canadian's long-term association with Ferrari.
Stroll finished in fifth position during his maiden campaign in Formula 3, in which he will race once more in 2016, and has now joined Williams.
Stroll will conduct extensive simulator duties, work placements in Williams' factory, as well as race engineering and marketing training.
"I'm really honoured to be part of such a great team and one with so much history and success," said Stroll.
"I cannot wait to start working with Williams and very much hope we can achieve great things together in the coming years.
"It’s a very exciting and crucial time in my short motor racing career. Reaching F1 was always the ultimate goal, I suppose ever since driving a go-kart my father had bought me for my fifth birthday.
"Williams has a long history of nurturing young drivers at the start of their F1 careers. David Coulthard, Jenson Button, Nico Rosberg, Nico Hülkenberg and most recently Valtteri [Bottas].
"This element was something that was important to me in making the decision to join Williams."
Williams currently has Alex Lynn and Adrian Sutil on its books, alongside the departing Susie Wolff.