NEW YORK — Actor Rory Culkin and cinematographer girlfriend Kate Arizmendi are over the moon — the Havoc Moon, that is.

That’s the name of the daughter the couple welcomed Saturday, their first child together.

Arizmendi announced her arrival Sunday in a series of photos in her Instagram stories. The first shot was taken just “15 minutes after pushing her out,” with mom noting that the wide-eyed newborn was “so alert and excited about life already.”

There was also a shot of the infant fast asleep, her tiny hands clasped almost in a prayer position, looking serenely peaceful.

“Her in the womb while I’m screaming System of a Down,” Arizmendi joked in her caption, referring to the Armenian American heavy metal band.

Other shots included “best papa” Rory Culkin cuddling his new daughter.

Rory Culkin, 36, is the youngest of seven children shared by stage actor-turned-manager Kit Culkin and Patricia Brentrup during their 21-year partnership: Shane, Dakota, Macaulay, Kieran, Quinn, Christian and Rory. They also had an older half-sister, Jennifer Adamson. Adamson died in 2000. Dakota was fatally hit by a car in 2008, when she was 29.

Like older brothers Macaulay and Kieran, who both starred in the first two “Home Alone” films, Rory started acting as a child and developed into an accomplished adult actor, with screen credits including “Signs,” “Lords of Chaos” and “Gabriel,” among many others.

Arizmendi, 38, is a cinematographer known for movie and television work on projects including “Monica,” “Succession,” “Dune: Part One” and “National Anthem.” The two began dating in 2023, according to TMZ.

Havoc Moon — full name Havoc Moon Alva Culkin — joins at least five cousins via her famous uncles, two with Uncle Macaulay and three with Uncle Kieran.

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