(Sports Network) - The world champion Miami Heat have landed Ray Allen, according to a tweet from Heat owner Micky Arison.

Arison broke the news Friday night by writing "Its 2:30am in London and I was just woken up with great news. Welcome to the family #20!!

Allen reportedly rejected a larger financial offer from the Celtics to join LeBron James, Dwyane Wade and Chris Bosh in Miami.

Thus, Allen's five-year run in Boston is over. The sharp-shooting guard was dealt to Boston in June 2007 after spending his previous 4 1/2 seasons with the then-Seattle Supersonics.

Allen won his lone NBA title with Kevin Garnett and Paul Pierce in 2008.

The NBA's all-time leader in three-point baskets, Allen has averaged 20.0 points, 4.2 rebounds and 3.6 assists over 1,148 career games with Milwaukee, Seattle and Boston. He has made 2,718 shots from beyond the arc.

In 128 playoff contests, Allen has averaged 18.2 points, 4.0 rebounds and 3.0 assists.

Allen, a 10-time All-Star, was originally drafted by the Minnesota Timberwolves with the fifth overall pick in the 1996 NBA Draft. He was immediately acquired by the Bucks in a draft night deal for Stephon Marbury.

NBA teams can't begin signing free agents until July 11.