A former schoolmate of slain Iowa college student Mollie Tibbetts bore the child of the man accused of killing her, according to a report.

Iris Monarrez was a cheerleader at Brooklyn, Guernsey, and Malcom High School while Tibbetts was on the track team there, a picture in their yearbook obtained by the Daily Mail shows.

While in school, Monarrez dated Cristhian Rivera, 24, who is accused of abducting and killing Tibbetts.

“Iris was very quiet, she kept to her friends. From what I can see she was a really nice person, shy but kind,” Bailey Gibson, 18, told the Mail.

“I’m sure she’s as shocked as we are.”

The couple had a child together in 2015, according to the outlet. Monarrez was in the gallery clutching a toddler during Rivera’s initial court appearance Wednesday.

Investigators believe Rivera abducted Tibbetts while she was out on a jog July 18. He allegedly told them he followed her, “blacked out” — then awoke, took her bloody body out of his trunk and dumped it in a cornfield.

Rivera had seen Tibbetts before that day, investigators said.

Monarrez is friends with Tibbetts and her two brothers, Scott and Jake, on Facebook. She graduated in 2016, a year ahead of Mollie.

Attempts to reach Monarrez on Thursday were not immediately successful.