Greta Gerwig — a potential Oscar frontrunner for her upcoming directorial debut “Lady Bird” — has exclusively told Page Six that it was a mistake to lend her name to a letter asking Lincoln Center to ban an Israeli-backed play.

David Grossman’s novel To the End of the Land tells the story of an Israeli mother’s journey after her son is summoned for military service. It’s a story about loss, love and the harsh realities of war written by a talented and subtle writer, a left-leaning critic of the Israeli government. Hanan Snir’s stage adaptation was presented at Lincoln Center and as a lefty Jewish American playwright I really wished I could see it. But I couldn’t.

In the weeks before the festival, that first production drew fire when several dozen artists (Caryl Churchill, Wallace Shawn, Lynn Nottage and Taylor Mac among them) signed a letter protesting the play on the grounds that the Israeli government had helped sponsor it and that the companies involved had performed in Israeli settlements within the occupied territories.

Ever since a group of surprisingly high-profile theater artists called on Lincoln Center to cancel its upcoming production of an Israeli state-sponsored play, New York City’s theater community has been reeling with discomfort. While many theater professionals sympathize with the Palestinian cause, few, in their heart of hearts, want to cancel a play, especially in today’s hostile cultural environment, where the president plans to eliminate the NEA and Trump supporters are interrupting Julius Caesar.