Surprise! Marina Squerciati is a mom again.

The Chicago P.D. star, 40, announced on Instagram that she welcomed her second baby with husband Eli Kay-Oliphant in 2024. In the post, Squerciati shared a Polaroid of herself pregnant while vacationing at The Miami Beach EDITION in Florida. In the photo, she showed off her bump while wearing a pink bikini and a floppy hat.

She also included a photo of a drawing her older daughter did, which showed herself, her daughter and Kay-Oliphant on what appeared to be a stage. “2024 was a BIG year for me, literally. I thought I handled being a pregnant working mom with grace—swipe to see my daughter’s very different take,” Squerciati wrote.

“PS. THIS was the real reason I wasn’t in the first two episodes of #ChicagoPD. Have a great NYE, friends!” she wrote at the end of her caption.

PEOPLE reached out to Squerciati’s representative for comment on her new arrival.

Squerciati and Kay-Oliphant welcomed their first child, a daughter whose name they haven’t shared publicly, in May 2017.

Earlier in December, Squerciati shared a photo of herself and her daughter on Instagram as they attended the Broadway show & Juliet, wearing wigs and sparkly outfits.

“& Juliet. We don’t need no stinkin’ Romeo. @broadwayinchicago,” Squerciati wrote in her caption. “Also I barely made it from work! We slapped on the wigs in the elevator, I ate my dinner on the El Platform, and we had to sprint a few blocks! (Just wanted to give you the reality behind the IG photos .)”

Just before the election, Squerciati shared another photo on her Instagram featuring the actress and her daughter posing in front of a mailbox and holding her ballot before sending it along. Her daughter could be seen wearing sunglasses and a white dress, holding one end of the envelope.

“Vote early, but make it fashion. @voteearlyday,” she wrote in her caption