Nico Rosberg was announced as the team's first driver on November 23, 2009. On December 23, 2009, seven-time world champion Michael Schumacher announced that he will be returning to Formula One with the Mercedes team. Brawn's former drivers Jenson Button joined McLaren, and Rubens Barrichello joined Williams team for 2010. With the acquisition of Brawn, Mercedes parted ways with McLaren. The 40% stake that Daimler (which owns Mercedes) has in McLaren will be sold back to the McLaren Group for a reported £500m.