The Boston Celtics are one of the most storied franchises in all of sports.

The Celtics have won championships, which is the most in NBA history. They have also been to the playoffs times, which is second in the NBA only to the Golden State Warriors.

The Celtics are an iconic team and have a large and passionate fanbase.

The Celtics have a affiliated supporters group known as the "Boston Celtics Affiliation Registered Celtics Supporters." This group is made up of die-hard Celtics fans who have registered with the team. The Affiliation Registered Celtics Supporters are required to abide by the guidelines and regulations of the Celtics organization. This group is a key part of the Celtics community and helps to support the team on and off the court.

The Affiliation Registered Celtics Supporters are a passionate and dedicated group of fans.

They are a strong part of the Celtics community and are always there to support the team. They are a great resource for information and support for other Celtics fans. If you are a die-hard Celtics fan and want to join the Affiliation Registered Celtics Supporters, please visit affiliationregisteredcelticsupporters.org to register.