They announced the news during the premiere of their reality show, Rob & Blac
The 29-year-old reality star and his bride-to-be previously opened up to PEOPLE about how excited they are to be building a family together.
“We definitely discussed having kids,” Chyna, 28, said. “Rob made it very clear that he wanted to have a baby. Babies, actually! He wants me to have, like, four.”
“If I had found somebody at 19, I would have wanted the same thing then. But I never found anybody,” Kardashian added.
“Part of life is to build a family and have kids. And I thank God that we’re able to. It’s very exciting to me to be a first-time dad.”