The 42-year-old shared a video on Instagram on Tuesday of her 10-month-old son, Malcolm Hiệp, wide awake during a time he was meant to be napping. In the clip, Munn used her phone's front camera to show her son, whom she shares with 40-year-old actor and comedian, John Mulaney, energetically crawling on the floor while wrapped in a white wearable sleeping bag.
"He's trying to drop his second nap!" Munn added as on-screen text to the video.
"He's too young to drop the second nap and I'm too tired for it to happen," the "Predator" and "X-Men: Apocalypse" actress wrote in the caption to her post. "How do I get him to nap?"
Fans and fellow parents were quick to offer their sympathy for the first-time mom, who gave birth to Malcolm in December 2021.
"Maybe do first one little earlier and shorter? Mine was a terrorist without it. Fell asleep too early with his face in [his] dinner. I like this workout you are having him do. Godspeed, sister," added actress and comedian Liz Carey.
"My daughter started fighting it at 10 months," another fan shared, along with a teary-eye emoji. "I kept at it 'til she turned one, then transitioned to one long nap."
"It's a terrifying thought, but not gonna lie — dropping down to one nap is the best thing ever! It's so long that you can actually get stuff done and then you have the entire morning to take him out and about," someone explained.
"It happens. Try not to get too anxious 'cause they pick up on that...you'll be OK," someone else mentioned.
In the past, Munn has often opened up to her nearly 3 million followers about her parenting journey. In August, the "Newsroom" and "Office Christmas Party" star the teething "nightmare" her son was experiencing.
"This will also serve as a group text to anyone I haven’t texted back. I will get back to you in however long it takes for this tooth to come out," she captioned an Instagram Reel of herself zooming in on her face, set to the song "Help!" by The Beatles.
Munn's message was met with praise from fans who shared their own struggles with similar issues as parents.
"Teething was brutal. You’ll be OK. Just drink a lot of coffee. That worked for me," one Instagram user penned.
"I remember those days with mine! It's tough. you will get through it!" another echoed.
One fan shared, "I've been waiting for my 8-month-old baby's teeth to come out! Teething is the worst!"
"We are right in the middle of this battle as well! Hang in there," commented another.
"You got this, super mama! It's just a phase," someone else chimed in. "Hang in there!"