Nico Rosberg has signed a new contract with Williams, ending speculation about a move to Formula One rivals McLaren.
Rosberg is a rising talent in F1
German Rosberg, 22, finished ninth in the drivers' championship last season and his new contract runs until the end of the 2009 season.
"Williams have made me an attractive, far better offer with a new contract up to 2009 and I decided to accept it," he told German newspaper Bild.
"For Williams the question of letting me go (to McLaren) never arose."
Rosberg, the son of Finland's 1982 world champion Keke, will be partnered by Japan's Kazuki Nakajima.
McLaren's Lewis Hamilton had mentioned Rosberg as one of the candidates, along with Adrian Sutil or Heikki Kovalainen.
Rosberg added: "I could imagine myself (joining McLaren) just like I could see myself at Ferrari in 2008. Every young driver wants a car that can bring you the title. 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."