GM Marc Bergevin and owner Geoff Molson donned Plekanec’s signature turtlenecks as part of the ceremony, which saw the 35-year-old receive the traditional silver stick given to those who reach the impressive milestone.
The festivities also involved a video presentation featuring former teammates sending their congratulations.
Plekanec signed a one-year, $2.25-million deal with Montreal this summer, and has one goal in two games this season. His lone goal came against Detroit on Monday, in what was game No. 1,000.
The 71st-overall pick of the 2001 NHL Draft broke into the NHL for good in 2005-06, and has spent his entire career with the Canadiens, save for a brief stint with Toronto at the end of last season.
He has 233 goals and 608 points in his career.