A Hamptons bachelorette party got wildly out of hand last weekend when one young woman was busted for allegedly attacking her sister — ripping out “clumps of hair” that were found strewn around their house.

Stephanie Rose Macri, 22, was arrested around 11:30 p.m. Saturday after cops responded to a disturbance at 61 Hog Creek Road in East Hampton, according to a police report obtained by The Post.

Macri’s sister, Sabrina Macri, 27 told officers that the pair got into a physical fight, claiming that her younger kin bit her arm, “causing redness and pain,” hit her under the right eye and pulled out chunks of her hair, the report said.

The officers saw a scrape under Sabrina’s eye and also “clumps of hair throughout the upstairs of the house,” according to the police report.

The victim said she wanted her sister arrested, and Stephanie was cuffed and transported to the East Hampton Police Department.

Stephanie Macri was charged with second degree harassment with physical contact.

She was arraigned on Sunday and was released from custody, an East Hampton Police Department spokesperson confirmed.

The East Hampton Justice Court could not be reached to confirm her next court date.

Stephanie Macri also could not be reached.

Sabrina Macri did not return a request for comment Friday.