Stevens will be introduced at a press conference Friday at 11 a.m.
The following is the press release sent out by the team:
The Boston Celtics  announced today that they have come to an agreement with Brad Stevens to be the 17th head coach of the team. Per team policy, terms of the deal were not announced.
Stevens, age 36, has served for the past six years as the head coach of Butler University men’s basketball team, never winning fewer than 22 games and leading the Bulldogs to two national championship games against Duke and Connecticut. His career win percentage is .772, including a 33-5 season in 2009-10. He was also the youngest coach to reach the Final Four since Bob Knight  in 1973.
A native of Zionsville, Ind., Stevens was a three-time academic All-America nominee while earning four varsity letters at DePauw University, before graduating with a degree in economics. He later joined the Butler University program as the coordinator of basketball operations under then-coach Thad Matta, before being named head coach in 2007.
“Brad and I share a lot of the same values,” said Celtics president of basketball operations Danny Ainge. “Though he is young, I see Brad as a great leader who leads with impeccable character and a strong work ethic. His teams always play hard and execute on both ends of the court. Brad is a coach who has already enjoyed lots of success, and I look forward to working with him towards Banner 18.”