The Williams FW15C was a car built by Williams for the 1993 Formula One Season. It was driven by Damon Hill, who came from the defunct Brabham team, and Alain Prost, who returned to the sport after a sabbatical after being fired by Ferrari in 1991. The predecessors, FW15 and FW15B, were designed, but it ended up with the FW15C being used due to that the predecessor, the FW14B, was dominant in the previous season. At the final race of the season at Adelaide, Alain Prost and Ayrton Senna ended their rivalry after 5 years.