A thieving trio robbed a livery cab driver in the Bronx early Saturday before jetting away in his brand-new ride, cops said.

The 35-year-old driver had just parked his blue 2017 Hyundai Elantra on Williamsbridge Road near Pelham Parkway North around 2:20 a.m. when two men approached and one of them held a knife to his neck — telling him not to move or look, according to police.

The second man then snatched the driver’s iPhone 6, car keys and wallet — containing $200 — while a third man acted as a lookout, cops said.

The three then hopped into the victim’s car, which had livery plates, and took off, cops said.

Cops were still looking for the suspects and the car Saturday afternoon.