Toro Rosso have announced that Jaime Alguersuari will drive for the Formula One team, taking the place of the sacked Sebastien Bourdais.
The 19-year-old Spaniard will become the youngest driver to take part in a Grand Prix when he races for the Italian outfit in Hungary this weekend.
The British Formula Three champion has been picked from Toro Rosso's young driver programme by boss Franz Tost.
Toro Rosso let French driver Bourdais go after two seasons with the team.
Bourdais scored six points in 27 grands prix for Toro Rosso, but is now threatening legal action against them for what he considers a 'breach in his contractual duties'.
Reports say that five-time world rally champion Sebastian Loeb could drive for Toro Rosso in the last Formula 1 race of the season in Abu Dhabi.
Alguersuari takes over from New Zealander Mike Thackwell as the youngest driver to start a GP weekend.
Thackwell took part in the Canadian GP in 1980 at the age of 19 years and 183 days, but was not classified as a race-starter because he did not take line up when it was restarted after a first-lap crash.
Alguersuari will be 19 years and 125 days if he starts Sunday's Hungarian GP.