Rob Kardashian and Blac Chyna are keeping all the details of their pregnancy secret ahead of their reality show.

A source said: "Rob is still very excited about the baby. When someone asks how Chyna and the baby are doing, he smiles and says, 'Great.' They won't share any details. They are saving it for their show. Even when friends ask, they refer to their show and say they will share it all on the show."

And Blac, who is engaged to the 29-year-old sock designer, is looking forward to making her own money through the show as she doesn't want to rely on the Kardashians and would rather pay her own way.

The insider added to PEOPLE magazine: "Chyna would never accept money from Rob's family. She always worked and wants to continue to find ways to make good money.

"She stopped doing club appearances now, so the money needs to come from somewhere else. Both Rob and Chyna are very excited about their show. They can't wait to share everything with their fans."

Meanwhile, Blac's close pal Amber Rose previously revealed her best friend - who also has three-year-old son King Cairo with her former partner Tyga - is "ecstatic" about the news she is expecting again.

She said: "I was the first person to know, obviously besides Rob [Kardashian]. I wanted to shout it out to the world like this is my baby, but I couldn't. I was screaming and like, 'Oh my God we're having a baby!' Chyna's my family so if she's having a baby, I'm having a baby.

"She's ecstatic. She's pregnant and she's with a man that they're both deeply in love with each other. To be happy and in love and having a baby and getting married. It's a great situation to be in."