A brazen pair robbed an off-duty NYPD cadet and his girlfriend at gunpoint in an early Monday stick-up in Chelsea, cops and sources said.

A 20-year-old – enrolled in the NYPD’s paid internship program for college students – was sitting in his car with his 22-year-old gal pal on West 25th Street near Seventh Avenue around 3:45 a.m., when two men ran up on them holding guns, authorities said.

The cadet and his girlfriend were sitting in his car on West 25th Street near Seventh Avenue. Google maps

“Give us what you have and don’t mess around,” one of the suspects demanded, according to the sources.

The woman handed over her beau’s wallet holding cash, credit cards and his NYPD-issued ID , the sources said.

But that wasn’t enough for the gun-toting duo, one of whom smacked the cade

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