Rob Kardashian and Blac Chyna are expecting a baby

Rob Kardashian is about to steal the spotlight right from his famous family.

Rob Kardashian and Blac Chyn just announced they're expecting a baby together, one short month after they revealed they were engaged. TMZ first broke the news that the duo were becoming parents and then Chyna seemingly confirmed the news with an Instagram post of a pregnant avatar with the caption of celebratory and baby emojis.

This will be the first child for the 29-year-old reality star and the second for Chyna, who shares a son, King, 3, with her ex, Tyga.

The Kardashian-Jenner camp hasn't commented on the baby news yet, but it's likely only a matter of time before they open up given the drama surrounding Rob's relationship. When Rob first announced his plans to marry the 27-year-old model, his sisters called the news f**ked up, but they apparently are getting more comfortable with the idea.

"Kylie is over the relationship," a source told ET. "It was tough for her in the beginning. But she sees how happy he is and all she wants is for him to be happy. The general consensus in the house is 'Praise Chyna! Don't go!' They finally got the brother they always knew back."

However, the baby news could change things. Kyile Jenner, 18, is dating Blac Chyna's ex, Tyga, which means that her new niece or nephew could have a somewhat strange relationship to their Aunt Kylie.

Needless to say, this will definitely make for some great reality TV fodder.

PHOTOS: Blac Chyna and Rob Kardashian together