The German will remain at the team for a further 3 years putting him out of the driver market until 2021.
Ferrari recently announced Raikkonen would stay at the Scuderia on a one year extension meaning Mercedes is the only one left to confirm its full line up.
And with Bottas likely to extend his contract, the top 3 teams are now locked for 2018.
Although there had been rumours recently that said Vettel may move to the Siver Arrows, and Niki Lauda did confirm there ha been talks with Vettel.
“We discussed it briefly once with him, but the more competitive Ferrari goes the less the reason he would want to leave,” Lauda said. “So, therefore, we stopped right away a couple of months ago.
“I think every driver, if he’s clever, talks to more than one team. Then when you negotiate you’re in a better position. That’s what he did.”