Joe Mazzulla has been appointed the permanent head coach of the Boston Celtics.

Mazzulla becomes the 19th full-time head coach in the franchise's history and he has also agreed an extension to his contract, though details were not confirmed.

The 34-year-old took over the Celtics on an interim basis in September following the suspension of previous head coach Ime Udoka.

Mazzulla has had an impressive impact on last season's NBA Finals runners-up, leading them to a league-leading record of 42-17.

The announcement from the Celtics came on Thursday following Wednesday's 127-109 win over the Detroit Pistons.

Mazzulla was hired by the Celtics in 2019 as an assistant coach following two years in his first head coach role with division two college Fairmont State.

He spent two of his first three seasons on the Celtics bench under former head coach and current president of basketball operations Brad Stevens, before retaining his role when Stevens was promoted and Udoka was brought in as the new head coach.

Stevens said following the announcement: "As he has shown, Joe is a very talented coach and leader. He has a unique ability to galvanize a room around a mission.

"We are thankful for the work he has done to help get us to this point, and excited that he has agreed to lead us into the future."

It was also announced last month that Mazzulla and the rest of Boston's coaching staff had earned the right to coach Team Giannis at this year's All-Star Game, which takes place in Salt Lake City on Sunday.