The 33-year-old actor and his longtime love Nadine, who reportedly wed in 2018, recently secretly welcomed a baby boy together, his 'Life Beth' costar Amy Schumer revealed.
Amy - who has two-year-old Jean with husband Chris Fischer - told Entertainment Tonight: "Michael has a baby too. Is that public knowledge? I just kicked him out, I just took him out." The child is out."
Michael confirmed: "We're right at the beginning of this. We're just doing the basics."
However, he did not provide any other details.
Amy also talked about being Cera's father when she was discussing 'Life Beth'.
She told Chelsea Handler on her podcast 'Dear Chelsea': "Michael Cera plays my romantic love interest. He's married, I'm married, we both have kids."
Michael previously dated his "Scott Pilgrim vs the World" co-star Aubrey Plaza and he previously revealed that the pair almost got married in Las Vegas.
She said: "I dated him for a long time. We drove across the country after shooting that movie and almost got married in Vegas.
"We love each other. We're still really good friends. He's just a weird little freak and we speak the same language. He's one of the funniest people I know."