Evan Agostini / Invision/AP 1 / 12
Evan Agostini / Invision/AP 1 / 12

Kim Kardahsian West and husband Kanye West are expecting their second child!

The "Keeping Up With the Kardashians" star revealed the big news in a tease following the mid-season finale of her E! reality-TV show on Sunday, May 31, 2015.

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"I just got the blood test back, and I am pregnant!" Kim can be seen telling sister Khloe Kardashian in the clip.

The expectant mom teased the big reveal on Twitter on Sunday afternoon, tweeting: "Who is excited for tonight's KUWTK finale?!?!?! There's some exciting news to share so make sure you tune in!!!!!"

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Season 10 of "Keeping Up With the Kardashians" has followed Kim's struggle to become pregnant with her second child after welcoming her first child, daughter North West, in June 2013.

"We are trying. We try every single day. You can't try harder than we try," Kim told E! News last month of her struggle to conceive. "It's getting exhausting. [Kanye] always says, 'Trying for baby No. 2 isn't as fun as trying to baby No. 1.'"

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In April 2015, Kim revealed that her doctors had recommended she use a surrogate to expand her family, but the reality-TV star said she wasn't ready to give up on conceiving her second child naturally: "I would like to hold out a little bit longer and still try," she told Matt Lauer during a sit-down interview. "I still have hope, so I'm just going to keep on trying."

Kim and Kanye, who celebrated their first wedding anniversary last week, have yet to reveal Kim's due date.