Pierre Gasly and Daniil Kvyat will race for Toro Rosso at the US Grand Prix, following Carlos Sainz's move to Renault as Jolyon Palmer's replacement.
Palmer announced after qualifying for the Japanese Grand Prix that Sunday's race at Suzuka would be his last with Renault, ending months of speculation and uncertainty over his Formula One future.
The move set off a chain reaction of announcements, as Renault confirmed that Carlos Sainz had been released by Toro Rosso to complete his move to the French manufacturer early and contest the rest of the 2017 season with the team.