Subway commuters got an Amazin’ surprise.
Mets fans on the 7-line train ahead of Tuesday’s third NLDS game against the Philadelphia Phillies were greeted by Grimace — the team’s good-luck mascot adopted from McDonald’s.
The purple character’s face was also plastered across the coincidentally purple train’s 10 cars — including one decal of Grimace sporting an iconic blue Mets cap.
The mascot boarded the Citi Field-bound train at 34 St-Hudson Yards shortly before 1:30 p.m., the MTA said.
One hilarious video captured the purple giant bouncing on the platform in anticipation — when the doors opened to reveal a crowd of surprised Mets diehards.
The costumed monster jumped straight into their arms and the group jumped up and down together with such ferocity that Grimace’s head repeatedly hit the roof of the train car.
“Grimace! Grimace! Grimace!” the crowd shouted.
The costumed Mets fan enjoyed the remainder of the 40-minute ride journey with the Metsies — before storming into the stadium to watch the Mets play its third playoff game against the Phillies.
The voyage is the latest in a strange and storied relationship between Grimace and the Mets, which kicked off in June when the fast-food monster threw the game’s first pitch.
“This celebratory moment was inspired by the fans who took to social photoshopping Grimace’s face on the purple train line after he threw the first pitch,” a representative for McDonald’s told The Post.
“Joining them, everyone’s favorite purple bestie made a surprise appearance riding with fans to Citi Field to cheer on the Mets.”
Unfortunately, the decals were a one-night special, even though the Mets will have at least one more game against the Phillies for a shot at the World Series.
Tuesday’s game marks the first of the five-game NLDS series on Mets turf, with each team heading in with a single win.
The next two games will bring the NLDS to Queens for the first time since 2015, when the Mets split two games at home against the Dodgers on their way to the National League pennant.
