Rev. Priest Daniel Lahart sj, ny post Regis High School in Manhattan

Priest fired from prestigious Regis High School in New York City over sex-misconduct allegations.

The Post has heard that the Jesuit priest in charge of Manhattan's prestigious Regis High School is being fired over allegations of sexual assault.

According to a letter sent to the community Sunday, the school — which counts Dr. Anthony Fauci among its prominent alumni — stated that it plans to oust Rev. Daniel Lahart for cause.

According to the letter obtained by The Post, the Board of Trustees concluded that Fr. Lahart engaged in improper and unwanted verbal interactions and physical behavior, both of a sexual nature, with adult members of the Regis group, including subordinates.

“This activity was not consensual, and it persisted despite direct demands from the involved parties to stop.”

The Upper East Side private all-boys school said it learned of the allegations in late February and immediately put Lahart, 59, on administrative leave pending an investigation.

According to the letter sent by Chair Anthony DiNovi, the Board of Trustees concluded that Lahart behaved improperly based on the conclusions of the outside investigator.

Lahart, who was elected president in 2016, was asked to take part in the investigation but declined, DiNovi wrote.

The priest was informed last week that the council, with approval from the Society of Jesus' USA East Province, intended to expel him from his position effective April 21.

The board said that it would withhold further information about the allegations "to protect the privacy of the individuals concerned."

We assure you that the inquiry was conducted in accordance with the letter's stated commitment to due process.

“Please understand that the Board did not make this decision lightly and took its duty to act with honesty, dignity, and compassion in the interest of our community seriously, both with regard to Fr. Lahart and to those members of our community affected by his conduct.”

A member of the school group was taken aback when he learned of Lahart's accusations.

“He was mostly interested in fundraising,” the individual explained. “There were no indications of this.”

Lahart was unavailable for comment Sunday and did not respond immediately to an e-mail or a message left for him at the school. Regis did not respond immediately to a request for comment.