He’s a brand-new cop — and soon he’ll be a newlywed, too.

Fresh off graduating the Police Academy Friday, one of the newest members of New York’s Finest popped the question to his unsuspecting girlfriend.

Mamadou Diallo, 29, of the South Bronx, got down on one knee as the couple’s young daughter, a large group of their relatives and his new brothers in blue proudly looked on.

It seemed Diallo’s girlfriend Djenabou Tall, 25, was the only one not clued in as a large gaggle of media jockeyed to get in position to capture the touching moment.

“Who are you here with?” one reporter asked Diallo.

“We are with family here. We’ve got my mom here and the love of my life,” he responded.

“Fiancée” asked one reporter. Probed another: “Is this your fiancée?”

The cop flashed a grin to his academy buddies as a confused Tall looked on before he got down on one knee.

Diallo slipped the sparkler onto the shocked woman’s hand as their young daughter grinned up at them and family cheered.

A horn also sounded in celebration as the newly engaged couple shared a touching kiss.

It was love at first sight, the newly minted officer told The Post.

“Ever since I saw her, I fell in love,” Diallo said. “We met through mutual friends.”

“I feel very proud and my parents are proud,” he said.

In 2017, another rookie cop proposed to his girlfriend in front of friends and family at Madison Square Garden.

Diallo will be working the beat in his local neighborhood of the South Bronx.

He was one of 433 new officers from 21 different countries who graduated on Friday.

Mayor Bill de Blasio praised the men and women, calling them an “extraordinary class.”

“No class has been better prepared to take on this crucial work,” Hizzoner said.

“I’ve never heard of complacency with the NYPD, only a deep desire to keep improving. They never stop getting better.”

Newly minted NYPD commissioner Dermot Shea also had some words of advice for his new recruits.

“Remember to be patient when you’re standing out there on 34th St. and Fifth Ave. and a thousand tourists pass by in 20 minutes and say, ‘Hey, where’s the Empire State Building?’ Tell them, ‘Look up.’”

“There is a sacred trust between the people of this great city and its police department. We need each other and we both know it,” he continued.