The German has spent the last three seasons in Turin, winning both Serie A and the Coppa Italia in each campaign but at 31, had been tipped for a summer departure.
Those rumours were given further credence when Juve announced on Thursday that they had completed the free transfer of Emre Can from Liverpool.
Can, 24, is seen as a long-term replacement for the former Real Madrid man at both club and international level and will now be aiming to take his place at the Allianz Stadium.
Despite being in the final year of his contract, Khedira is keeping his calm, insisting he is excited about the new arrival, while maintaining he currently has no intention of leaving Turin.
"He's a very important signing, I know him well and I'm glad he's joined us," he told Gazzetta dello Sport.
"Why do I say 'us'? Because I'll definitely stay at Juventus and I have no intention of leaving. I'm fine there."