Jenson Button [ Images ] is to rejoin Williams from next season, the Formula One team said.

Button started his career with Williams in 2000 as 20-year-old before moving on to Benetton -- now Renault [ Images ] -- and his current team BAR.

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The 24-year-old has had a superb season and lies third in the drivers' championship with 61 points after finishing second in the German Grand Prix [ Images ] behind world champion Michael Schumacher [ Images ].

In a press release on Thursday, Williams said Button had "signed for the team for the 2005 season and beyond". Media reports said he had penned a two-year deal.

"I am very pleased that I had the option to re-join the BMW [ Images ] Williams team where my Formula One career started," Button said.

"For the meantime the 2004 season has my full focus and attention.

"Beyond this, I have every confidence that the massive investment in resources and the depth of talent at Williams and BMW provides the best platform for my future ambitions to be a world champion."

Williams team chief Frank Williams said: "I am delighted that one of the most talented drivers in Formula One has accepted the opportunity to return to the team."

Button will join Australian Mark Webber [ Images ], who moves from Jaguar, in a new-look Williams line-up next season. The pair replace Colombian Juan Pablo Montoya [ Images ] and German Ralf Schumacher who are moving to McLaren [ Images ] and Toyota [ Images ] respectively.

Williams currently lie a disappointing fourth in the constructors' championship on 47 points, 29 points behind third-placed BAR.