In a stunning move, Gov. Andrew Cuomo agreed to debate Democrat challenger Cynthia Nixon on Monday, after she spent months pressing the incumbent to agree to a face-off.

The forum is set for Aug. 29 at Hofstra U. and will air live on WCBS-TV and other CBS stations around the state, according to the Cuomo-controlled state Democratic Party.

The Nixon campaign quickly agreed to the debate, even though it said it had no role in negotiating the debate’s rules.

“Cynthia will debate Governor Cuomo backwards and in high heels if she has to,” said top Nixon strategist Rebecca Katz.

The actress-turned-activist has repeatedly pressed Cuomo for such a forum — and had previously accepted debate proposals from two other New York City stations: WABC-TV and NY1.

It’s a dramatic reversal for Cuomo, who refused to debate his 2014 opponent in the Democratic primary, Zephyr Teachout, and hasn’t debated a major opponent one-on-one in at least a decade. Debate always included minor party candidates.