A pair of hangry Labor Day crooks held up a Bronx Little Caesars at knifepoint — and made off with someone’s pizza order, police said late Wednesday.

The two unidentified men showed up at the “Pizza! Pizza!” haven around 6 p.m. Monday and tried to bust in through the drive-through window, authorities said.

Video shows the bumbling thieves opening the window while one of them hoists himself inside, belly down, onto the counter before employees rush to push him back out, cops said.

The men then barged into the restaurant through the front door, brandishing a knife and snatching a $23 pizza order, police said.

“They did all that just for pizza?” a law enforcement source quipped.

Cops are still looking for the suspects, who fled.