The scene was like a Garden party just outside the World’s Most Famous Arena as the Knicks secured a commanding 3-1 series lead over the Celtics with a thrilling 121-113 victory in Game 4 on Monday night.

The crowd at the viewing party just outside Madison Square Garden erupted as the final buzzer sounded, jumping up and down, with a DJ blaring the Knicks’ anthem “Go New York, Go New York, Go!” 

Fans could be heard singing along to the iconic tune while one supporter waved a giant Knicks flag. 

A group of fans could also be heard chanting “Knicks in five!” 

In another video that went viral, Knicks fans flooded the area outside of MSG, seemingly shutting down Seventh Avenue — though it appeared traffic was still moving on the street. 

“Let’s Go Knicks!” chants could be heard as the camera panned around the area, with fans visible as far as the eye could see. 

Another video showed a man wearing a Knicks jersey playing a trumpet in the middle of a sea of blue and orange fans. 

Inside the building, the Knicks shared a video of celebrity superfan Ben Stiller jumping up and down and screaming in the back area of Madison Square Garden. 

The scenes inside and around MSG are ones that have played out before during the Knicks’ playoff run last year and this series against the Celtics. 

“It was crazy,” Mitchell Robinson said about the home crowd. “I think it was way crazier than the other playoffs that we’d been in before, but this one definitely No. 1.” 

The Knicks are on the verge of doing something that hasn’t occurred for the franchise in 25 years. 

The victory on Monday night put them one win away from their first trip to the conference finals since 2000.