The news comes almost a year after Andretti Global's original attempt to become the 11th team on the grid was rejected by Formula One Management, despite the FIA having initially granted their entry.
F1 revealed in their official statement that since the initial Andretti bid, which was led by former F1 driver Michael Andretti, it had been made clear that it would be the GM/Cadillac name that would be leading the entry.
New F1 team confirmed for 2026
GM/Cadillac will join the grid in 2026, but General Motors will not start producing engines for the new outfit until later years, it was revealed in the announcement.
While Michael Andretti stepped down as CEO of the brand in September - to be replaced by businessman Dan Towriss - his father Mario Andretti looks set to have a major role in the new F1 entry.
Andretti senior is an F1 world champion, with his single title being won back in 1978.
In an official statement, it was revealed that Andretti would be serving as a director on the new outfit's board, with the delighted champion revealing: "My first love was Formula 1 and now - 70 years later - the F1 paddock is still my happy place.
"I’m absolutely thrilled with Cadillac, Formula 1, Mark Walter, and Dan Towriss. To still be involved at this stage of my life - I have to pinch myself to make sure I’m not dreaming."