The Stranger Things star, 22, and husband Jake Bongiovi, 24, are parents of two. Here is what is confirmed, and the clue fans spotted first.
People confirmed on Thursday, Sept. 17, that the couple welcomed their second child through adoption, a little over a year after their first.
The baby's name and sex have not been made public, and the couple's reps had not commented as the news broke. That privacy is a pattern for them.
In August 2025 they shared that they had welcomed a baby girl through adoption that summer, asking for peace and privacy: "And then there were 3."
On Sept. 7, Millie posted a family video from Italy's Dolomites. Jake wore a baby carrier while she held their daughter, and fans began to wonder.
Born May 7, 2002, in New Jersey, Jake is the son of rocker Jon Bon Jovi (pictured) and Dorothea Hurley. He left Syracuse University to act.
They began dating in 2021, made their public debut at the BAFTAs in March 2022 and announced their engagement on Instagram in April 2023.
The couple wed in a private ceremony in May 2024. Just over two years later, they are raising two children, both welcomed through adoption.
In July 2026 she told Access Hollywood that since becoming a mom, everything is about her daughter, and she wants more female heroes on screen.
Stranger Things, her breakout as Eleven since 2016, ended in 2025. Enola Holmes 3, her third film as the young detective, hit Netflix July 1.
From Phoenix Comicon at 12 (pictured, 2016) to mom of two at 22. Expect the couple to keep their kids' names and faces private.