Who Is Sam Altman’s Husband? Open AI CEO Welcomes Premature Baby Boy: He Came Early

Sam Altman, the CEO of OpenAI, joyfully announced the arrival of his baby boy on February 23 through a heartfelt post on X (formerly known as Twitter).

Altman, who is married to Australian software engineer Oliver Mulherin, revealed that their baby was born prematurely and is currently under medical care in the Neonatal Intensive Care Unit (NICU). Despite the early arrival, Altman shared that the newborn is doing well.

Open AI CEO Welcomes Premature Baby Boy

In his post, Altman, 39, expressed his joy, writing, “Welcome to the world, little guy!” He also shared an emotional photo of the baby’s tiny hand holding an adult’s finger, adding, “He came early and is going to be in the NICU for a while. He is doing well and it’s really nice to be in a little bubble taking care of him.”

Altman concluded his post by saying, “I have never felt such love.”

Microsoft CEO Satya Nadella was among the first to congratulate Altman, commenting, “My heartfelt congratulations, Sam! Parenthood is one of life’s most profound and rewarding experiences. Wishing you and your family the very best.” Thousands of other well-wishers joined in to celebrate the joyous occasion.

Who Is Sam Altman’s Husband?

Sam Altman and Oliver Mulherin tied the knot in either late 2023 or early 2024. Their wedding, which took place at a picturesque seaside location, became public when photos of them exchanging rings went viral in January 2024.

Altman later confirmed his marriage to NBC News. In an interview with New York Magazine in September 2023, Altman mentioned their desire to start a family soon.

Sam Altman’s husband is Oliver Mulherin, an Australian software engineer. The couple got married sometime in late 2023 or early 2024. They are known for keeping their personal lives private, but their wedding became public when photos of them exchanging rings at a seaside location went viral in January 2024. Altman later confirmed the marriage to NBC News.

Despite their low-key lifestyle, they made a rare public appearance at the U.S. State Dinner hosted for Indian Prime Minister Narendra Modi in 2023. Recently, they welcomed their first child, a baby boy, born prematurely in February 2025.

In January 2025, Bloomberg reported that they were expecting their first child, with a due date in March 2025.