Kubica’s departure was announced in September and Latifi, 24, will partner Briton George Russell next year.
Latifi has spent this season as the team’s reserve driver and has taken part in a number of practice sessions.
“We look forward to him stepping up into this new role, as we look to fight our way back to the midfield,” said Claire Williams, deputy team principal.
Latifi finished second in this year’s Formula 2 championship.

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