Stefano Coletti will compete in IndyCar during the 2015 season after securing a drive with KV Racing.
The Italian, who has spent the last four years in GP2, had tested for the team earlier this month at NOLA Motorsports Park.
Coletti, 25, will race alongside former IndyCar champion Sebastien Bourdais in one of the team's Chevrolet-powered cars.
"I've always wanted to race in IndyCar and have the opportunity to live overseas," Coletti said. "It's a great championship and the competition is very high!
"It's a great opportunity to be on the same team as a driver like Sebastien Bourdais who his very experienced, very quick and a nice person to work with. I couldn't have asked for better for my rookie year!
"I really would like to thank Kevin Kalkhoven and Jimmy Vasser and also KVRT's General Manager, Steve Moore, for making this possible and look forward to an exciting year with the team."
Coletti had impressed the team during his first outing at NOLA, finishing as fifth fastest of the Chevrolet-powered drivers.
"We are very pleased and excited to add a driver of Stefano's talent to KV Racing Technology," said team co-owner Jimmy Vasser.
"Stefano has shown he can win at a very high level during his time in GP2 and we were extremely impressed with his knowledge and feedback during the test last month at NOLA.
"There will obviously be a learning curve, especially on ovals, but I think everyone feels that Stefano is up to the task."