Kim Kardashian is pregnant with her second child with US rapper Kanye West.

The reality television star announced she is expecting another baby during an episode of Keeping Up With The Kardashians, which was broadcast in America.

In a preview clip for a future episode, she told sister Khloe: “I just got the blood test back, and I am pregnant!”

Kim Kardashian and Kanye West
Kim and Kanye are to be parents again (Clint Spaulding /AP)

Kim, 34, gave birth to her daughter North in June 2013 and has made no secret of how much she wanted a second child, telling ITV’s Lorraine recently that the current series of her reality TV show was about the “journey of trying to get pregnant for the second time, which has proven to not be as easy as the first time”.

She had also told E! News that she and Kanye had been trying for another baby for over a year: “We are trying. We try every single day. You can’t try harder than we try. It’s getting exhausting. He always says, ‘Trying for baby number two isn’t as fun as trying for baby number one’.

“But we’re literally trying everything that we can to make it happen, so I’m to the point now where it’s not as stressful to me. And maybe that’s when they say it happens.”

Ahead of her show being broadcast in the US, Kim, 34, tweeted that some big news was imminent.

Kim’s mum Kris Jenner has congratulated the couple on their good news.

Meanwhile, North’s second birthday is coming up this month and according to The Sun, her parents are planning a party inspired by the Eddie Murphy film Coming To America for her complete with zoo animals, African drummers and a mini throne and crown.

A source said: “It’s Kanye’s idea. He loves the film.”

Kanye is set to appear as one of the headline acts at Glastonbury later this month.