Williams have launched their new car for the 2017 season, with the challenger carrying a predominantly white livery.
The FW-40, which also has red and blue stripes running down its centre, is wider than the 2016 car and has bigger tyres following regulation changes.
Felipe Massa and Lance Stroll will drive for the team this season.
Massa reversed his decision to retire at the end of last season following Valtteri Bottas' move to Mercedes.
More to follow.