NEW YORK — For “Fifty Shades of Grey” fans, Thursday belonged to Christian.

A fresh book in the erotic franchise was released on hunky Christian Grey’s 28th birthday to the delight of teens to mid-life mommies eager to read the story as told from his perspective.

Kimberly Caravallo, 20, a college student from the Bronx, wasn’t about to miss it. She and her sister waited nearly 15 hours to be first in line at a Barnes & Noble store along Fifth Avenue to get their copies of “Grey” signed by EL James herself.

Why? Because Christian is “extremely dreamy,” Caravallo said.

Roughly 300 other people joined them as James passed release day in New York rather than back home in London.

Amber Garrow, a 38-year-old teacher’s aide and mother of four from Connecticut, hopped on a train at 4:30 a.m. and headed to Manhattan for her fourth time meeting James.

So what’s the big deal about the retelling of the first Fifty book from Grey’s eyes?

It’s the period where he first meets the young and innocent Anastasia Steele and tries to convince her to embrace his BDSM lifestyle as his submissive. Ana narrates the trilogy that has sold more than 125 million copies worldwide.

“We’ve been curious about his thoughts and how he feels about certain situations,” Garrow said.

“It’s truly about two people saving each other.”

And did her kids know what she was up to?

“My oldest one just rolls his eyes and walks away,” Garrow said.