Bobby Orr of the Boston Bruins flies just after scoring the winning goal in the 1970 Stanley Cup final. The Bruins are unveiling a statue to honour that moment. ((Associated Press))

The Boston Bruins are unveiling a statue of Bobby Orr in his defining moment.

The bronze sculpture depicts the most beloved player in Bruins history flying through the air with his arms outstretched after scoring the goal that clinched the 1970 Stanley Cup championship against the St. Louis Blues.

It's scheduled to be unveiled Monday outside the TD Garden, where the Bruins will host the Philadelphia Flyers in Game 6 of their Eastern Conference semifinal series.

The ceremony comes on the 40th anniversary of the goal.

Orr is expected to attend, along with Bruins owner Jeremy Jacobs, Boston Mayor Tom Menino and some of Orr's teammates.

The 600-pound statue is 110 per cent of life size. Designed by renowned sports sculptor Harry Weber, it will be on permanent display outside the arena.