Valtteri Bottas is a former GP3 champion. He joined Williams as a test driver in 2010 and remained in the role until the end of the 2012 season, making his race weekend debut at the first practice session for the 2012 Malaysian Grand Prix. On 28 November 2012, it was announced that Bottas would be promoted to a race drive for Williams in 2013, a position he retained for 2014 till 2016. He then moved to Mercedes at the start of the 2017 season and is contracted to drive for them until the end of the .