After the termination of their Toyota contract, Williams announced that from the season they were to enter into a "long-term partnership" with Cosworth, and would be using an updated version of the CA V8 engine which powered their cars in 2006. Williams also announced a complete driver change for the 2010 season. Rubens Barrichello joined from 2009 Constructors' Champion Brawn GP, whilst GP2 champion Nico Hülkenberg graduated from the test driver seat. Replacing Hülkenberg in the test seat was Finland's Valtteri Bottas, who finished third in the 2009 Formula Three Euroseries as well as winning the non-championship Masters of Formula 3 event at Zandvoort.