The announcement will take place in the team's headquarters in Grove, where Williams will confirm it has retained Valtteri Bottas for another season and has signed Stroll as his teammate.

European F3 champion Stroll turns 18 on Saturday, with Williams having put off announcing the Canadian as its race driver until after his birthday so as to avoid any possible issues with title sponsor Martini.

Stroll will be replacing Felipe Massa, who is set to cap off a 15-year Formula 1 career in the 2016 season finale in Abu Dhabi.