Olivia Munn and John Mulaney’s Son: Everything They’ve Said About Malcolm Hiệp

Olivia Munn and John Mulaney are proud parents.

The couple welcomed their first child, son Malcolm Hiệp Mulaney, on Nov. 24, 2021. Since then, his parents have watched him reach big milestones, such as saying his first words, trying new foods and even learning how to open doors.

As the child of two celebrities, Malcolm has also experienced some pretty cool moments, from traveling to beautiful destinations like Colorado’s Red Rocks Park to visiting his dad in New York City on the set of Saturday Night Live.

In July 2024, Malcolm watched Munn and Mulaney get married in an intimate ceremony. Two months later, his little sister, Méi June Mulaney, arrived.

Here’s everything to know about Munn and Mulaney’s son, Malcolm.

He was named after his great uncle

Munn explained in an Instagram Story that her baby boy’s name has a special meaning. When Malcolm was five months old, the actress introduced him to his great uncle, Vinh Hiệp Luong, whom Munn said she named him after.

“Malcolm got to meet his great uncle. His middle name is named after him💛,” Munn wrote, calling her uncle her “favorite.”

He made his Instagram debut in December 2021

Munn and Mulaney introduced Malcolm to the public on Christmas Eve in 2021, sharing the first photos of their baby in separate Instagram posts. Since then, Munn has documented her early days of motherhood and shared some of Malcolm’s cutest moments.

“My Golden Ox baby. Malcolm Hiệp Mulaney. Happy Holidays,” Munn captioned her first post of Malcolm.

Mulaney also shared a snap of his son sleeping, writing, “Meet Malcolm Hiệp Mulaney. 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. Happy Holidays.”

He has already accomplished some major milestones

Munn and Mulaney are clearly proud parents, often posting Malcolm’s major life accomplishments on social media. First words and first steps aside, Munn was particularly excited about another achievement: Malcolm’s restaurant debut.

“Crazy pho you. Malcolm goes to his first restaurant,” Munn captioned an Instagram post that showed her little one seated on her lap as she enjoyed Pho. Other images featured Mulaney and Munn’s mother Kim as they all posed for a group pic with Malcom.

Munn described him as the “chillest baby”

In celebration of Munn’s four-month anniversary as a new mother in March 2022, she penned a heartfelt tribute post to Malcolm. “It’s been 4 months since the happiest, chillest baby came into my world,” the actress captioned the post.

“He wakes up smiling every single morning without fail, he loves bath time so much that he kicks his legs and looks around whenever he hears the sound of the tub filling up, his tiny fists are his favorite things to gum on and he squeals and follows along page by page whenever we read to him … Happy 4 month birthday Malcolm. I love you I love you I love you.”

He visited Mulaney at Saturday Night Live

Take your kid to work day seemingly has no age limit! Munn shared an adorable trip to the SNL set, where she brought a then three-month-old Malcolm to visit his dad on the job.

Munn posed next to a television screen that showed a black and white image of Mulaney (who hosted the Feb. 26 show) as he gave their son a kiss on the head. “Proud of my guys,” she wrote.

In another adorable father and son moment, the actress shared a shot of Mulaney standing in a dressing room holding the baby boy as they both wore dress suits. “My favorite photo,” she wrote over the picture on her Instagram Story.

Munn and Mulaney are teaching him through storytime

Munn and Mulaney are playing teacher to their baby boy, and having a lot of fun in the process. The actress noted that Malcolm took a liking to story time when he was four months old. In a hilarious clip posted to Munn’s Instagram, Mulaney can be seen holding his son in his lap as they read a book while teaching his son about the sounds animals make.

He pointed to a picture of a snake and made the sound “ssss,” which Malcolm copied. The couple cheered the toddler on before Mulaney pointed to the next animal. “Wait, what about this?” he asked, pointing to a “piggy.”

Malcolm didn’t hesitate to make a snorting sound, which made Mulaney laugh, falling back on the couch.

He had a big bash for his first birthday

Munn and Mulaney pulled out all the stops for their son’s first birthday in November 2022. The highlight of the birthday bash? Chocolate cake, of course!

The Gateway actress posted several shots of Malcolm eating pieces of cake with his small hands. The toddler — wearing a white shirt with gray shorts and a knitted crown with a “1” on it — was quick to get messy, with pieces of chocolate smeared across his face and all over his outfit.

She accompanied the post with some sweet words for her 1 year old. “Just got back from celebrating ONE YEAR of the most joyful baby being in this world and in our lives,” Munn said. “My son, my joy. Happiest Birthday, Malcolm Hiệp! I love you so so so much.”

He was his mom’s first thought when she was diagnosed with cancer in 2023

While talking to PEOPLE about her battle with breast cancer in April 2024, Munn admitted that “having a little baby at home made everything much more terrifying.”

During treatment — which included a double mastectomy and now, hormone suppression therapy that has put her into medically induced menopause — Munn said that being with Malcolm is the “only time my brain doesn’t think about being sick.”

“Im just so happy with him. And it puts a lot of stuff into perspective,” she said. “Because if my body changes, I’m still his mom. If I have hot flashes, I’m still his mom. If I lose my hair, I’m still his mom. That’s really what matters the most to me. I get to be here for him.”

He attended his parents’ wedding

Munn and Mulaney wed in a simple, intimate ceremony in July 2024, PEOPLE confirmed.

The event took place at a friend’s home in New York and the couple exchanged vows in front of Malcolm and one other witness, according to a source.

He is a big brother

Malcolm became a big brother on Sept. 14, 2024, when his sister, Méi June Mulaney, was born. His parents welcomed Méi via surrogate after Munn’s cancer diagnosis.