John Mulaney joked his career would be over if he "did a perfectly accurate impression" of his mother-in-law. The 41-year-old comedian - who revealed last month he had secretly tied the knot with actress Olivia Munn, 44, in New York City - has opened up about his new in-laws, including Olivia's mother Kimberly, who immigrated from Vietnam to the US in 1975. Asked about getting to know his wife's family, he told 'Late Night with Seth Myers': "It's the greatest single time in my life.

"I've been in a lot of interesting situations. I've never - marrying into a large Vietnamese family is one of the most fun things I've ever done." When his friend asked for more details, the former 'Saturday Night Live' star quipped: "If I did a perfectly accurate impersonation of my mother-in-law, it would be a career ender.

So, we all, kind of, know that." Kimberley - who he affectionately calls Miss Kim - had joined John for his appearance on the late night talk show, and he joked that one member of the family always joins you "anywhere". He teased: "One of them will come with you anywhere.

And they call me John Mulaney, full name. A little wrong, full name all the time. 'Olivia is here with John Mulaney.

' Yeah. And they're the greatest." After moving to the US, Kim settled in Oklahoma, where she met Olivia's father Winston, and John eventually did an impression of the family's accent to illustrate the two cultures coming together.

He said: "So, [the children] have Vietnamese and Oklahoma accen.