Move over Mr. Met, there's a new King of Queens.

This year's New York Mets' incredible run of success – which saw the team rise from summer cellar dwellers to a spot in next week's NCLS – has fans of the blue and orange ascribing an unlikely purple figure.

Grimace.

The famous McDonald's advertising mascot has captured the hearts of Mets fans since he threw out the first pitch at a game in June and the team's bad luck quickly turned around early in the season.

Now the streaking team is on the verge of returning to the World Series and Grimace Mania is raging – the mascot's face is seen everywhere, from subway cars to T-shirts to stadium signs.

“With each team win, we noticed that more and more people were associating the (hot streak) with Grimace,” Trisha Donlin, one of the masterminds behind the team’s brand marketing, told The Post on Friday.

“This is us. We're fun. We’re fan-driven.”

The so-called Grimace Effect began on June 12, when the mascot threw out a first pitch to celebrate his 53rd birthday as part of a marketing campaign with Mickey D's, the Mets' longtime sponsor.

Although Grimace's pitch was terrible in itself, the Mets' performance afterward was not, as they defeated the Florida Marlins 10-4 and began a five-game winning streak.

And when the team made the playoffs, fans considered Grimace a good luck charm.

Some have edited the Happy Meal expert into videos, while others have dressed up like him in games. The infamous 7 Line Army began serving a purple vodka elixir called Grimace Punch at their watch parties.

The team branding people quickly saw the fun and brought the purple monster into the game.

“From a brand perspective, you know there’s something there when you see people having conversations about your brand and taking the time to create their own videos and their own content,” Donlin said

The Mets branding team decided to add fuel to the fire by slowly sneaking Grimace into Instagram posts, their 2025 season calendar, and even the team picture. At one point, they even worked with McDonald's to put his image on the game's move #7.

The comments section of the average Mets social media post soon transitioned from blame for the Mets' poor performance to celebration of the booming team's spirits.

Soon, even casual fans were celebrating the purple monster – since he burst onto the scene, Grimace-related social media content has garnered a total of 13 million impressions.

“Our fans are extremely passionate. They find it, so we just said, 'Hey, if you know it, you know it,'” Will Carafello, the Mets' senior director of social media campaigns, told The Post on Friday.

Mets marketing managers were careful to “play it lightly” during the four-month Grimace journey, lest they turn their come-to-life meme into utter cringe.

“We don’t want to be one of those brands that gets too caught up in it and then ruins it for everyone,” Carafello said.

Mr. and Mrs. Mets – the team's true mascots – were seemingly lost in the chaos. But Donlin's team tried to show fans they harbored no hard feelings by having the pair present Grimace with his own jersey in an on-field ceremony.

Near-constant silliness has always been at the core of the Mets' personality. But their post-Grimace success has left the Mets dealing with something the straight-laced Yankees are more accustomed to – jealous haters.

“It feels like the fans are more jealous and say, 'Oh, I wish that could be us,'” Carafello said.

Fans can expect Grimace to ride out the Mets-mania wave for the rest of the postseason – which will hopefully lead the Queens team to the World Series.

However, the finale – which New Yorkers dream of will be a duel between the no-nonsense Yankees and the fun-loving Mets – is likely to be the purple giant's last hurrah, making way for the next silly saga to take its place.

“I think we will write a new chapter in our history next year,” Donlin said.