Brazilian Rubens Barrichello will drive for Williams next season after switching from this year's constructors' champions Brawn GP.
The 37-year-old veteran will form a new driver partnership with promising young German Nico Hulkenberg at the English-based team for the 2010 season.
Hulkenberg, 22, has been the team's test driver in 2009.
They replace German Nico Rosberg and Kazuki Nakajima of Japan, who are leaving after a disappointing 2009 season which has seen Williams finish a lowly seventh in the constructors' standings.
Team principal Frank Williams told the team's offficial Web site www.williamsF1.com that he was delighted with his new signings.
"Rubens needs no introduction. He is not only the most experienced driver in Formula One, but a passionate and talented driver who fought hard for the drivers' championship this year," he said.
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