A pregnant Milwaukee mom was killed — but her baby miraculously spared — when a gunman in a passing car opened fire on her party bus over the weekend, according to a new report.

Annie Sandifer, 35, who had five children and was pregnant with her sixth, was on board a party bus parked outside Gene’s Supper Club on the city’s northwest side around 2:30 a.m. Saturday when someone drove past in a silver, four-door sedan and fired at least five shots from a sunroof, the Milwaukee Journal Sentinel reported.

The bus rushed Sandifer to Ascension St. Joseph hospital, but she did not survive.

Her son, however, was delivered in stable — but very premature — condition, as his mother was only 26 weeks pregnant, according to the report.

“He’s Definitely A Fighter,” relative Sasha Daniels posted to Facebook, with photos and videos of the newborn at the hospital. “It’s In His Genes His Mama Fought Her Last Fight And Blessed Him With The Light Of Life.”

A crowd of supporters gathered outside the supper club Saturday to release purple balloons into the sky in remembrance of Sandifer, the Sentinel reported.

Her husband, Lorenzo Sandifer, who had just married her in May, brought bright red, Valentine’s Day-themed balloons.

Sandifer’s aunt Jeanette Thomas called her niece her “bestie” and said they had just spoken on the phone around 8:30 p.m. Friday.

“Then I ain’t talk to her no more,” Thomas told the paper. “She had kids to go home to. She had a whole family. It’s a cold world out here.”

Relatives urged whoever is responsible to come forward.

It’s unclear whether the bus was the intended target.