Williams has confirmed that Valtteri Bottas and Felipe Massa will remain with the team into the 2015 Formula 1 season.
Bottas made his debut with the team in 2013 while Massa moved across from Ferrari at the start of the current campaign.
"I’ve been a member of the Williams team for five years now and we have developed together throughout that time which is a great feeling," said Bottas.
"The team has also made some very impressive gains this season and I’m confident that I’m at a team that is moving in the right direction and can continue to be competitive," said Bottas.
"Sir Frank [Williams] and Claire [Williams] have put a lot of faith in me and I’m very grateful that they continue to do so. Felipe and I have a good working relationship and this early announcement will help us both input into the ongoing development of the FW36 and the FW37."
"I’m really enjoying my time at Williams and I feel settled here," said Massa.
"Williams is such an iconic name in motor racing and I have a lot of pride when racing for this team. This season we have started to show our true potential and I’m driving a car that is looking strong and has improved a lot as the season has progressed which is very encouraging for the future.
"It’s important that we continue to push in the second half of the season and that we start 2015 with some really good momentum that we can build on."
