Williams have confirmed Sergey Sirotkin will replace Felipe Massa for the 2018 F1 season after protracted deliberations.
Robert Kubica and Paul Di Resta miss out.
“It took a huge amount of work to get where I am, and I’m really happy and thankful to everyone involved. Sirotkin said.
“To say I’m happy and proud to join such a famous team like Williams is an understatement,”
Paddy Lowe, Williams chief technical officer, said: “We have conducted a rigorous and exhaustive driver evaluation process.
“Ultimately, Sergey impressed the team with his driving pace and talent, technical feedback and work ethic, both at the factory and trackside in Abu Dhabi.
“I’m delighted he will be joining the team to partner Lance next season.
“Lance will be going into his second season with us, after notable achievements in his rookie year.
“We have an exciting line-up for 2018 which we believe will help us to maximise the potential of the FW41.”