Reports surfaced on Friday suggesting Chyna, whose real name is Angela White, was expecting the couple's first child together - and now the news has been made official.
A representative for Chyna has confirmed she is pregnant, reported People magazine.
"I can confirm she's pregnant and of course she's happy," her spokesperson said, shortly after the parents-to-be hinted the news was true by posting an animated image of Chyna bearing a bulging stomach on their Instagram accounts.
Sources said the 27-year-old model had been planning to make the announcement on Mother's Day on Sunday.
The baby will be Chyna's second child. She is also mother to three-year-old King Cairo from her relationship with rapper Tyga, who is dating Rob Kardashian's half-sister Kylie Jenner.