Engaged reality TV stars Rob Kardashian and Blac Chyna, who revealed in May that they were expecting their first child together, have announced they’re having a girl.

“We having a girl! Can’t wait to see her,” Kardashian, 29, said on Instagram following Sunday night’s episode of E!’s “Rob & Chyna,” which included a scene of the couple getting the news in their doctor’s office.

On Monday afternoon Blac Chyna, 28, posted an Instagram image of what appears to be a sonogram, captioned, “Rob Kardashian and I can’t wait to meet our baby girl.” Blac Chyna has a nearly 4-year-old son, King Cairo Stevenson, with her former boyfriend, the rapper Tyga. Tyga, 26, is dating Rob Kardashian’s youngest sister, 19-year-old reality star and entrepreneur Kylie Jenner.