Kim Kardashian and Kanye West's surrogate is in labor with their fourth child

Kim Kardashian West and Kanye West will soon have a family of six!

Kim Kardashian and Kanye West's surrogate is in labour. Her sister Kourtney Kardashian broke the news during an appearance on The Ellen DeGeneres Show on Thursday, as she revealed the power couple were currently at the hospital and awaiting the birth of their fourth child, a son, via surrogate.

As the 38-year-old reality star was also set to appear on the show, however Kourtney revealed the reason for her absence - much to the shock of both the audience and their mother Kris Jenner, who was left bewildered.

It remains unclear if the 41-year-old rapper and 38-year-old reality star will be in the delivery room though Kim was during the birth of daughter Chicago.

Kim may not have been present but her three kids daughter North, five, son Saint, three, and daughter Chicago, 15 months made a surprise appearance with three more of their cousins.

Ellen asked about why the middle Kardashian sister was absent and Kourtney, 40, replied: 'So, my mom doesn't even know this but Kim's surrogate went into labor so she's at the hospital.

Kris, 63, appeared to be blindsided by the news as her mouth dropped and she said: 'What are we doing here? Come on, Ellen! Fire up the car.'