The cozy Upper East Side townhouses on tree-lined boulders weren’t enough to satisfy these Bonnie and Clyde training teens – they held up a cab driver at gunpoint on Friday morning and sent him to the hospital.

Dean Rufli, 16, and Hawa Sakho, 16, hailed a cab early Friday morning around 1:30 a.m. near East 74th Street and Third Avenue, near where Sakho lives, and attacked the driver who picked them up, police sources said.

Sakho pointed a gun at the 28-year-old driver as the duo asked for his cell phone. Rufli then punched him in the eye, sending him to New York Presbyterian Hospital with a facial injury, law enforcement sources said. The teenagers left with the phone and fled.

“I’m at a loss for words,” Rufli’s father Peter told The Post over the phone.

“Something like that is definitely out of character.”

He said his son and Sakho are friends and he couldn’t believe this type of behavior from either of them.

“She’s a very, very nice girl” who wouldn’t do something like that, Peter said.

Police say the teens, who both have addresses on the Upper East Side, were arrested shortly after their stroke and arrested. They will both be charged as adults, police said.

Rufli was charged with assault and theft and Sakho was charged with theft, threat and criminal possession of a weapon.

They are both in the 19th Police Station and will be taken to Manhattan Criminal Court tonight for reservation and arraignment.