The Big 12 presidents and chancellors voted on Friday to accept BYU, Cincinnati, Houston and UCF into the conference.
In a statement, the Big 12 said the four schools were "approved unanimously by the eight continuing members."
The move comes less than two months after Big 12 co-founders Oklahoma and Texas announced they would join the SEC by July 1, 2025, leaving the future of the remaining eight schools in the Big 12 in a precarious position. Big 12 officials moved quickly to make the league whole again, forming a subcommittee that concluded that the most successful football schools in the American Athletic Conference -- Cincinnati, Houston and UCF -- were the top choices, along with independent BYU.