Rob Kardashian and Blac Chyna having a boy

Rob Kardashian and Blac Chyna are expecting a baby boy, according to her father.

The couple – who got engaged in April after four months of dating – are utterly thrilled to be having a child together, and the make-up artist’s dad Eric Holland has claimed he knows the gender of the unborn tot.

The pair told him they were having a son when they spent Independence Day (04.07.16) with him earlier this month.

Speaking to the new issue of Now magazine, Eric – who refers to Chyna by her real name Angela – said: "Rob and I have had some one-on-one time. All I can say is he’s excited about the prospect of a boy.

"For Angie, the most important thing is that the baby is healthy. They were really excited when it kicked for the first time.

"They’ve chosen a name but they’ve not told anyone what it is. They want to wait until the baby is born."

And Eric thinks his daughter – who already has a three-year-old son, King Cairo, with her ex-boyfriend Tyga, who is dating Rob’s half-sister Kylie Jenner – and Rob will go on to have a big family.

Eric mused: "I said to Rob, ‘I know you’re just going to keep going with Angie until you have more than one boy, right?’ and he laughed. It wouldn’t surprise me if they went on to have four or more kids.

"Some people say she’s using Rob as a stepping stone. I don’t think so. They’re great together and they’re right together. They love each other and that’s all that matters."

While Chyna is giving in to her pregnancy cravings, Rob – who retreated from the public eye after his weight ballooned – is doing his best to stick to his diet.

Eric said: "Angie is loving steak and ice cream right now. It’s what she ate the whole time she was over here at the restaurants in Washington DC. Rob makes sure she gets what she wants – but not too much.

"Rob is on a diet. At every meal Angie is telling him, ‘Rob you can’t eat that.’ But he’s still a big guy. Losing weight is a tough thing. It’s great they’re looking out for each other."