Ferrari driver Felipe Massa will move to Williams next season.
The Brazilian will partner Valterri Bottas with Pastor Maldonado set to leave the British team.
It had already been confirmed that Massa would not be driving for Ferrari next season, with Kimi Raikkonen partnering Fernando Alonso from 2014.
Massa came close to winning the World Driver's Championship in 2008, but was pipped to the post by Lewis Hamilton at the final Grand Prix.
The 32-year-old suffered a life-threatening head injury at the 2009 Hungarian Grand Prix when a suspension spring struck his helmet.
However Massa returned the following season, although he has not won a race since the season-ending Grand Prix of 2008.