Game 1 of The NBA Finals between the Golden State Warriors and Cleveland Cavaliers delivered a 12.9 overnight rating, making it the highest-rated Game 1 ever on ABC.

The broadcast peaked with a 15.6 from 11:30 p.m.-11:45 p.m. ET. 

The rating represents a 24 percent increase from Game 1 last season between the Miami Heat and San Antonio Spurs.

Game 1 delivered a 41.4 rating in Cleveland and a 28.9 in San Francisco.