From “Superbad” to super dad!

Jonah Hill is expecting his first baby with his partner, Olivia Millar.

The mom-to-be debuted her baby bump Monday while shopping in Santa Monica, Calif., in photos obtained by the Daily Mail.

She covered her stomach in a black sweater and denim overalls.

In addition to her budding belly, Millar made headlines for the sparkler she sported on her ring finger while out and about.

Hill’s rep has not responded to Page Six’s request for comment on the pair’s pregnancy and rumored engagement.

The duo were previously spotted at a children’s store called Kokonut Kids in Hawaii in January.

The actor, 39, and the Chasseresse co-founder, who keep their relationship private, have been dating since 2022.

Hill was previously engaged to Gianna Santos in 2019 before calling it quits with the photographer, 33, the following year.

While dating Sarah Brady in 2022, the “You People” star denied speculation that he had proposed to the professional surfer.

“The rumors are not true,” he wrote via Instagram that February, joking that he was only engaged to “your mom.”

Six months later, Hill deleted his social media account.

The Oscar nominee has since been keeping a low profile, explaining in a Deadline letter last August that he has experienced anxiety attacks for 20 years “exacerbated by media appearances and public-facing events.”

Hill clarified that he no longer plans to promote his projects.

“I’m hoping to make it more normal for people to talk and act on this stuff,” he wrote at the time. “So they can take steps towards feeling better and so that the people in their lives might understand their issues more clearly.”

The Golden Globe nominee’s last red carpet appearance was in December 2021 for the “Don’t Look Up” premiere with Brady.

That same year, Hill asked the public to stop commenting on his weight gains and losses.