Pierre Gasly will make his Formula One debut with Toro Rosso at this weekend's Malaysian Grand Prix.
The 21-year-old Frenchman has been given an opportunity due to the poor performances of the team's Russian driver Daniil Kvyat.
According to Toro Rosso, Gasly will replace Kvyat "for the next Grands Prix".
"For a variety of reasons, some of them due to technical problems, but others being mistakes of his own making, Daniil Kvyat has not really shown his true potential so far this year, which is why we are standing him down for the next races," team principal Franz Tost told Toro Rosso's official website.
"This will give us the opportunity to evaluate Pierre on track during a proper race weekend."
Gasly, one of the Red Bull junior programme drivers, has been racing in Japan this year in the Super Formula category.
His F1 chance comes after 23-year-old Kvyat struggled to impress this season, scoring just four points from 14 races.
Gasly said: "This is a great opportunity for me.
"I feel as ready as I can be, having had to be prepared for anything in my role as Red Bull Racing's third driver this year.
"I will do my best to perform well with Scuderia Toro Rosso during these coming races."
Despite dropping Kvyat, Toro Rosso insist the driver still has a future with the team.
"This is not a case of goodbye for our Daniil, as he still remains part of the Red Bull family," they added.