Rob Kardashian is "really calm" about becoming a father.

Rob Kardashian and Blac Chyna

Rob Kardashian and Blac Chyna

The 'Keeping Up With The Kardashians' star isn't too worried about his and his fiancée Blac Chyna's impending arrival, according to his sister Khloe Kardashian.

She said: "Rob is fine. He says he's really fine and calm about it, but I was like, 'It's OK if you're nervous!'

"I think anybody would be nervous. But he seems super chill about it, so that's good."

And Khloe and her family are very much looking forward to the arrival of the baby girl and she revealed Chyna has been joking that it is as much their child as it is hers.

She added: "Chyna keeps joking like, 'This is our baby!' Like with me too. So it's like, I haven't been getting prepared, but I'm like, 'Should I be putting a nursery in my house too?' Chyna's like, 'Are you so excited? We're having a baby soon!' And I'm like, 'Wait, are you kidding or am I really having a baby with you?'"

Khloe loves being an auntie to Kim's children - North and Saint - and Kourtney's kids Mason, Penelope and Reign.

She told Us Weekly magazine: "I love them all. It's such a great thing to have another baby just to have with us, it's great. But at first, they're just with the mom, like you forget about them. They're never around 'cause the other kids are so rough, they're like all toddlers, you know? I just want to fast-forward!"

Meanwhile, Chyna previously revealed the couple have already chosen a name for their little girl.

She shared: "Yes, I have picked out a name. Me and Rob both love it - it's super girly and you'll never guess what it is."