Nico Rosberg has agreed a new two-year contract with Formula One team Williams, ending speculation that he could move to McLaren as a replacement for Fernando Alonso.
A Williams spokesman confirmed that Rosberg's new deal would run up to the end of 2009.
"I'm delighted about having two more years with Williams," the 22-year-old German driver told Bild am Sonntag newspaper. "Williams made me a much improved offer and I decided to accept it."
Last month the Williams team confirmed that Japan's Kazuki Nakajima would race for them alongside Rosberg next season.
"I'm now the number one driver in a very good team," said Rosberg, son of Finland's 1982 champion Keke.
"Of course I could have imagined myself at McLaren (in 2008), just as I could have imagined being at Ferrari. Every young driver wants to be a in a winning car and to win races. I'm no different. I race for success.
"But I feel I have to be patient, like most people. There are only a few exceptions like Lewis (Hamilton) who can have immediate success. Mika Hakkinen had to wait six years for a first win."
McLaren have yet to announce a replacement for double champion Alonso, who left last month and is expected to re-join Renault, as team mate to 22-year-old Briton Hamilton.
Former champions Williams finished fourth in the constructors' championship this year after McLaren were stripped of all their points for a spying controversy.
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