McLaren will return to full-time IndyCar racing in 2020 in partnership with Arrow Schmidt Peterson Motorsports and Chevrolet.
The team will be renamed Arrow McLaren Racing SP, entering two Chevrolet-powered cars in next year's championship. No drivers were mentioned.
Former Indianapolis 500 winner Gil de Ferran, the sporting director of McLaren Racing, will lead a dedicated group independent of the Formula One team.
McLaren last competed full-time in the IndyCar championship in 1979.
"This team provides McLaren with the right synergy as a strategic partner for our return to the sport. We believe together we can help each other achieve our mutual ambitions," said McLaren Racing CEO Zak Brown in a statement on Friday.