The driver in question is one Kevin Magnussen, a Danish driver who just sealed the Formula Renault 3.5 championship. Kevin is the latest in a string of racing scions, following in the footsteps of his father Jan Magnussen who also drove for McLaren (as well as Red Bull predecessor Stewart GP) in addition to NASCAR, Indy and Le Mans. Kevin is part of McLaren's young driver development program and tested for the team at both the Abu Dhabi test session last year and the Silverstone test this year, earning the FIA Superlicense necessary to race in F1.
His promotion to the big leagues is unfortunate news for Sergio Perez, whose seat Magnussen will fill next season. The young Mexican was part of Ferrari's driver development program and showed early promise in GP2 and Formula Three, scoring his first podium finishes in his second season on the grid with Sauber, but has failed to capitalize on the potential of driving the McLaren this season. Just where he lands next remains to be seen, but while McLaren has yet to officially confirm its drivers for next season, it is expected to keep former world champion Jenson Button on board alongside Magnussen.