John Mulaney, Olivia Munn share first photo of baby son: 'He has his whole life ahead of him'

Meet Baby Mulaney.

On Christmas Eve, new parents John Mulaney and Olivia Munn shared a first photo of their infant son, Malcolm Hiệp Mulaney.

The sweet little one was pictured sleeping in a soft blue hat and wrapped in a fuzzy white blanket.

"Meet Malcolm Hiệp Mulaney," wrote Mulaney, 39, on Instagram. "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."

"My Golden Ox baby," wrote Munn, 41, on her Instagram page, adding a similar holiday greeting.

'I'm going to be a dad':John Mulaney confirms Olivia Munn is pregnant, opens up about rehab

In September, Mulaney confirmed that he and Munn were going to be parents. 

"In the spring, I went to Los Angeles, and met and started to date a wonderful woman named Olivia – Olivia Munn," Mulaney said Sept. 7 on "Late Night with Seth Meyers." "And we're having a baby together. … I'm going to be a dad. We're both really, really happy."

This is the first child for both Mulaney and Munn. The pair reconnected earlier this year after the comedian, who has been open about his struggle with addiction, split with his artist wife Anna Marie Tendler and completed a rehab stint and a subsequent stay in sober living.

Mulaney told Meyers he was grateful his comedian friends had staged an intervention for him last fall, and gave kudos to Munn.

“I got into this relationship that’s been really beautiful with someone incredible," Mulaney told Meyers. "Olivia and this baby have helped save me from myself and this early journey out of recovery."