The new mama secretly gave birth to a little boy last month in Los Angeles. The loved-up couple welcomed their bundle of joy on November 24, one day before Thanksgiving, according to TMZ.
The funnyman first revealed the duo was expecting in September, with him spilling: "I'm gonna be a dad!" while appearing on Late Night with Seth Meyers.
Mulaney and Munn's baby news came months after the comedian called it quits with estranged wife Anna Marie Tendler, whom he had been married to since 2014. The former flames announced their split in May, with Mulaney filing for divorce two months later.
Around the time news of their split was made public, rumors began circulating of Mulaney's blossoming romance with the New Girl alum. Though those close to Tendler questioned the timeline of the new flames' romance, Mulaney and the artist apparently split months before he started up his relationship with his baby mama.
The actress has opened up about her motherhood journey in recent months, admitting she's excited to be "bringing a little person into this world.” And though she admitted last month she doesn't feel "prepared" to become a mother, Munn, 41, will have her handsome hunk by her side, as they navigate this new chapter of their lives.
As for how Mulaney felt before welcoming their little one, he confessed while talking to Meyers: “Olivia and this baby have helped save me from myself in this early journey of recovery.” The Big Mouth star is also confident in Munn's abilities as a mother, with an insider sharing: “He thinks the world of her and knows she’ll be a great mom.”
Mulaney and Munn first connected years ago at a wedding, where Munn was fangirling over the comedian. The mother-of-one later sent the former Saturday Night Live writer well wishes in December after he checked himself into rehab following his sobriety relapse.
Since the couple was first romantically linked in May, sources have been gushing over their whirlwind romance, with an insider noting Munn believes Mulaney is her "dream guy" and is absolutely "smitten" with the father of her baby.