Grandmother of ‘Ivy Nepo Baby’ Ramona Sarsgaard was a radical herself—and her best friend would go on to lead the Weather Underground

Runs successful nan family.

The grandma of “Ivy Nepo Baby” Ramona Sarsgaard — nan girl of actors Maggie Gyllenhaal and Peter Sarsgaard who was arrested during an anti-Israel protestation this week astatine Columbia University — was besides a extremist successful college.

“I went wild,” screenwriter Naomi Foner Gyllenhaal told The New York Times successful 2004 of her clip astatine Columbia’s sister school, Barnard College, wherever her champion friend was Eleanor Stein, who went connected to go a fugitive leader of nan panic group Weather Underground.

The extremist leftist outfit undertook a number of attacks successful nan US, including nan infamous March 1970 accidental bombing of a Greenwich Village townhouse.

“I still thought we could do it successful nan system,” recalled Naomi, now 79, who utilized Stein’s clip connected nan tally arsenic inspiration for her 1988 flick, “Running connected Empty,” astir a family of fugitives connected nan tally from nan FBI aft a bombing.

A Brooklyn autochthonal who grew up successful a family of “high-achieving New York Jews,” nan elder Gyllenhaal — mother to Maggie and her character brother, Jake — besides supported head and screenwriter Jonathan Glazer’s arguable 2024 Oscars speech, successful which he compared Nazi Germany to Israel’s conflict successful Gaza.

While much than 1,000 Jewish creatives slammed Glazer’s speech, Gyllenhaal was among 300 group who signed a missive backing nan director.

“We should beryllium capable to sanction Israel’s apartheid and business — some recognized by starring quality authorities organizations arsenic specified — without being accused of rewriting history,” according to nan missive Gyllenhaal signed.

Maggie’s father, head Stephen Gyllenhaal made it clear that he and Naomi are nary longer together erstwhile reached by The Post Saturday.

“We’re divorced, you know,” Gyllenhaal, 75, said from his Los Angeles home. When asked astir Ramona’s arrest, he said only, “they speak for themselves.”

Naomi Gyllenhaal could not instantly beryllium reached for comment.

Sarsgaard, 18, who attends Columbia College, was slapped pinch a table quality summons for criminal trespassing Wednesday, nan sources said. She could not beryllium reached for comment.

Her dad, Peter Sarsgaard, declined remark Saturday connected his daughter’s brushwood pinch nan law.

“I don’t person thing to say,” he said extracurricular nan family’s Cobble Hill home.