Cera met his wife, Nadine, during a press tour for "Arrested Development" in Paris, according to Elle. He opened up about seeing her for the first time in a 2022 episode of Justin Long's "Life is Short" podcast. "We went down the street one night to this little bar in Paris and she was there with all her flatmates and we were smiling at each other in this very unabashed way," he said. "There was no shyness, we just kept seeing each other and smiling. It was so comfortable. It was a really unfamiliar way to experience a stranger and I felt like I saw the whole thing." Cera later explained that he extended his trip in France to get to know Nadine more.
The "Barbie" actor and Nadine have stayed out of the public eye for the majority of their relationship. In March 2018, a source told Us Weekly that the two were married after the pair were spotted with matching wedding bands. In the fall of 2021, they privately welcomed their first child together. He confirmed the news in a March 2022 interview with Entertainment Weekly (via People), saying, "We're right at the beginning of it. We're doing the very basics right now."
Though he prefers to maintain a low profile, Cera did open up more about fatherhood in a 2023 interview with The Hollywood Reporter. "I think the only thing that it affects is that you just want to spend as much time with them as possible. So when I was 20, I would have been way happier to go off to some weird city and live in a hotel for three months. And when you have kids, you want to be with your family. And you miss them a lot," he said.