Daniel Ricciardo will be Toro Rosso's third and reserve driver for the 2011 season and the 21-year-old Australian will drive in the Friday morning practice sessions at every race, replacing each of the team's current drivers in turn.
As already confirmed this year, Scuderia Toro Rosso’s driver line-up of Jaime Alguersuari and Sébastien Buemi remains unchanged for 2011.
Ricciardo is a product of the Red Bull Junior Team young driver programme. This year he came second in the Formula Renault 3.5 series, after winning the 2009 British Formula 3 championship.
Toro Rosso team principal Franz Tost said: "When our team was created, its stated aim was to bring on young drivers from the Red Bull Junior Team, so Daniel's appointment as our third driver is an obvious one.
"Although Daniel has done some F1 testing already, running on Fridays at the grands prix will give him a valuable insight into the additional pressures of doing it for real during a race weekend. I am also sure that having a hungry youngster on the books will keep our current driver pairing nice and sharp!"
Daniel himself said: “I am really excited at the prospect of driving for Scuderia Toro Rosso in the practice sessions next year, so I have to say thanks to Red Bull for this great opportunity.
"My main priority for 2011 is to win the Formula Renault 3.5 championship, but my ultimate aim is to be a full-time Formula One driver and this new role has to be the best step towards achieving that ambition.”