May 31, 2015 10:05 PM

TIMOTHY A. CLARY/AFP/Getty

World, get ready for another Kardashian!

Kanye West and Kim Kardashian West are expecting a sibling for 23-month-old daughter North.

The couple “are expecting their second child, due at the end of this year,” her rep tells PEOPLE. “They are overjoyed and looking forward to his/her arrival.”

The news was delivered during a teaser at the end of the midseason final of Sunday’s Keeping Up with the Kardashians, and E! Tweeted congratulations to Kardashian West, 34, directly after.

Shown confiding in sister Khloé Kardashian, the reality star exclaims, “I just got the blood test back, and I am pregnant!”

Kardashian West has been open about the challenges she faced in trying to expand her family. “I complain so much about how I hated being pregnant, and I never thought I would be begging to be pregnant,” Kim told sister Kendall Jenner on an episode of KUWTK in April.

“Trying for baby number two is just not fun like baby number one … I’m like, ‘I’m ovulating in five minutes! Get over here!’ “

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And sources say West, 37, who has also spoken out about wanting more kids, has changed for the better since North was born. Says Kardashian’s trainer Gunnar Peterson: “A lot of people worry that being a dad will take away from work or couplehood, but Kanye has gotten better at everything since he’s become a dad.”

Now, the happy couple, who just celebrated their one-year wedding anniversary, are over the moon to become parents of two.

“Kim and Kanye love being parents,” a source close to Kardashian told PEOPLE. “And they love spending as much time as they can at home with the family.”

— Aili Nahas with reporting by Jennifer Garcia

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