The Warriors and Cavs are heading to the Finals for the third time in four years.
The Lakers are making their third straight appearance in the NBA finals.
And the Pacers are looking to get their first NBA championship since 1984.
The three teams were originally set to meet in the first round of the NBA playoffs last season, but that matchup was scrapped because of a knee injury to LeBron James.
The Heat won that game, but James was knocked out in the fourth quarter, and the series was put on hold.
James missed the rest of the regular season because of his injury, and it was James who was named MVP of the Finals.
The series will return to Cleveland next year, as the Cavs and Warriors battle for the Eastern Conference title.
The Pacers are hoping to make it a double-header this time around, but are hoping for a playoff spot.