MONTEREY, Calif. -- Colton Herta's future in the NTT IndyCar Series was confirmed today when Andretti Autosport announced a joining of forces with Harding Steinbrenner Autosport that will make Michael Andretti's Indianapolis-based organization a five-car team for next season.

Herta and his No. 88 Honda will officially run under the banner of Andretti Harding Steinbrenner Racing as HSR principals Mike Harding and George Steinbrenner IV will join Andretti as leadership partners in the program.

The partnership is born from a technical alliance between Andretti Technologies and Harding Steinbrenner Racing, which provided engineering support this season.

Herta, who climbed the European racing ranks before joining Andretti Autosport for the 2017 and 2018 Indy Lights seasons, ranks third in the IndyCar Rookie of the Year standings heading to Sunday's Firestone Grand Prix of Monterey, the final race of the INDYCAR season.

Herta has won a race and two poles in his first IndyCar Series season. He is the youngest race winner in Indy car history.

"It's always been a goal of mine to drive for Andretti Autosport ever since watching my dad drive for them in the mid-2000s," Herta said. "I've very thankful for the Steinbrenners and Mike Harding for their efforts through my career and continued efforts into this year.

"I've grown up around the Andretti team and many of the guys that have been working there since my dad's days of driving are still with the team. I'm sure I'll feel right at home. I can for sure tell you this is going to be the longest offseason I've had in a while, and I can't wait to hop in my brand-new Andretti Harding Steinbrenner Indy car."

Herta will join Andretti teammates Alexander Rossi, Marco Andretti, Ryan Hunter-Reay and Zach Veach next season.

"This partnership and expansion of Andretti Autosport will bring about a positive direction and new opportunities for all involved," Andretti said. "I'm also thrilled to be able to keep Colton in the Andretti family. We've watched him grow and develop, and we are excited to see the next chapter as he continues his charge in becoming a strong, competitive force in the IndyCar Series."

"I am very proud of Harding Steinbrenner Racing's 2019 NTT IndyCar Series season," Harding said. "The No. 88 crew, Colton Herta and our partnership with Andretti Technologies have worked extremely well, and we have had some great accomplishments this season. I am also honored that the No. 88 will combine forces with Andretti Autosport to become Andretti Harding Steinbrenner Autosport for the 2020 NTT IndyCar Series season with Colton Herta as the driver."

Said Steinbrenner: "We are extremely excited to be continuing and expanding our partnership with Andretti Autosport. Andretti has become like family to me, and the team as we have shared a connection since the very beginning of Steinbrenner Racing. We see this as an opportunity to build upon a successful 2019 and create an environment of sustained competitiveness. We are thrilled we have been able to retain Colton's services and look forward to a fruitful tenure together."

INDYCAR concludes its 17-race season with the Firestone Grand Prix of Monterey on Sunday. Television coverage will begin on NBC at 2:30 p.m. ET (11:30 a.m. PT local) with the green flag scheduled for 3:15 p.m. (12:15 p.m. local). Live radio broadcasts will be available on the Advance Auto Parts INDYCAR Radio Network and SiriusXM Satellite Radio (XM 205, Sirius 98, Internet/App 970).