"Meet Malcolm Hiệp Mulaney," Mulaney captioned his photo. "He has his whole life ahead of him. He hasn't even tried seltzer yet. I'm very in love with him and his whole deal."
And on Thursday, Munn shared a photo of Mulaney and Malcolm to her Instagram story, giving their fans a first glimpse of the comedian as a father.
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The photo was one in a series of photos and clips Munn shared of her family making Bánh bao, a Vietnamese bun.
In the picture, Malcolm sits in a pot as Mulaney holds the lid over his head, seeming to joke that his son is the meal.
"Lol daddy's new Bánh bao recipe," Munn wrote on the photo, underscoring the humorous shot.
Munn shared a second photo that offered a close-up view of Malcolm's face.
"Adora-bao," Munn wrote on the photo.
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Mulaney announced he and Munn were expecting a child during an appearance on NBC's "Late Night" in September.
During the show, Mulaney spoke candidly about his relationship with Munn and how she supported him through his recovery from addiction to alcohol, cocaine, and prescription drugs, for which he completed 60 days in rehab in February 2021.
"She got to date me right out of recovery, which is what they call a reverse catch," Mulaney told host Seth Meyers. "... It is a very lucky thing to have met this woman."
"I got into this relationship that's been really beautiful," he added. "She's kind of held my hand through that hell."
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