Olivia Munn's Newsroom Costar Sam Waterston Played This Special Role in Her Wedding to John Mulaney

Olivia Munn and John Mulaney's wedding had an extra special dun dun.

Turns out, Newsroom  the couple's nuptials were officiated by none other than Law & Order alum Sam Waterston, who costarred with Olivia on The Newsroom from 2012 to 2014, according to TODAY.com

Olivia and John tied on the knot during a private ceremony at a friend's home in New York over the July 4 weekend, with their 2-year-old son Malcolm in attendance.

The couple—who were first linked in 2021—celebrated their marriage just days after Olivia's 44th birthday July 3. For the occasion, she took a moment to reflect on the ups and downs she's experienced—including her breast cancer diagnosis—writing on Instagram July 3, "What a year."

Fortunately for Olivia, she's had John by her side through all of it.

"Thank you for fighting so hard to be here for us," the 41-year-old commented on her Instagram post sharing her diagnosis. "Malc and I adore you."

And Olivia is hopeful the couple will have more to look forward to, as she recently shared that they have discussed having more children—something she was afraid wouldn't happen because of her cancer.

"John and I had a long talk about it," she told Good Morning America in May. "We realized that we weren't done growing our family."

Olivia explained that following her double mastectomy, she went "through a round of egg retrieval," a process that in itself was scary because her cancer could feed off the hormones needed for the retrieval process.

"So I knew there was a risk," she continued. "And our doctor said, 'Look, we're gonna get one for you, and then we're gonna call it.'"

Their journey had a positive outcome.

"Our doctor called, and he said, 'Hey, we got the results back. It's two healthy embryos,'" she recalled. "We just started bawling crying, both of us."

She added, "We really just hope that it works out for us to be able to have another baby. We just want one more. I'm not gonna ask for too much more in this life, I promise. I just want one more baby."

For more of John and Olivia's most adorable family moments, keep reading.

John Mulaney and Olivia Munn celebrated their son Malcolm's second birthday in November 2023.

The parents took Malcolm to the Gem State in June 2023.

Olivia shared this photo of her family of three on Father's Day 2023.

John and Olivia hit the beach with Malcom in March 2023.

The couple rang in theirMalcolm's first birthday in November 2022, with Olivia joking that her mom Kim was getting "impatient" with the cake-cutting.

John celebrated his 40th birthday with Olivia and Malcolm in August 2022.

Olivia snapped a sweet moment between John and their son on stage at Red Rocks Amphitheatre in Colorado in April 2022.

The family of three posed alongside fellow parents Dan Levy and Rachel Specter with their daughter Penny.

Olivia and John celebrated Malcolm turning 4 months old on March 24, 2022.

"Daddy" John cuddled with Malcolm on his 4-month birthdate before heading out to Texas.

The actress shared, "It's been 4 months since the happiest, chillest baby came into my world."

John peered over at his baby boy in this throwback photo from his birth. The comedian wrote in March 2022, "Four months ago I met a 6 lb boy who changed my life forever." 

Olivia captioned this adorable embrace with a teddy bear emoji.

Olivia shared a pic of Malcolm with his grandma a.k.a. the "retired tiger mom." 

Olivia gushed over her baby boy.

Olivia and John introduced Malcolm to friends Henry Golding and Liv Lo Golding, as well as the couple's daughter Lyla, in January 2022. 

John and Henry were seen laughing as they held up their tiny tots.

The friends snapped a selfie while introducing their babies.

As Olivia wrote, "Malcolm met Lyla today."

Olivia and John were pictured arm-in-arm during a sweet moment, seemingly gazing at their little one in January 2022.

"Uncle" Pete Davidson visited Malcolm in January 2022.

John gave his son a kiss on the cheek.

Malcolm fell asleep in dad's carrier during an outing at the Norton Simon Museum in Pasadena, Calif.

The Newsroom actress celebrated New Year's Day 2022 with a new pic of Malcolm.

John shared a selfie with his Malcolm, kept cozy in a blue beanie, while they took a walk.

Olivia shared that this was what it looked like "when your friend shows up and surprises you with a blowout even though you're in your robe and not going anywhere."

She said the new 'do made her "feel a little less post partum."