'Little People, Big World' stars Zach & Tori Roloff expecting first baby -- see their announcement!

Zach and Tori Roloff are ready for baby!

The Little People, Big World stars shared their exciting baby news on Instagram on Monday.

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"Guess what... Zach and I are SO excited to FINALLY tell you guys the news!" Tori wrote alongside a photo of the couple holding up ultrasound photos.

"Thank you so much already for the love and support we have received!" the momma-to-be continued. "This is going to be one fun adventure! #ZandTpartyofthree"

The pair, who will welcome their first child next spring, also shared news of the pregnancy in a video for TLC, the network that airs their show.

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Zach, who has dwarfism, revealed how he found out the news that he was going to become a father.

"I walked into the house and she had written it on a notepad that she was practicing her calligraphy, so I was reading through this," he recalls in the video. "On the last page, she wrote, 'You're going to be a dad!' and I skipped right over it. Then she said, 'Wait, hey, you missed it!' Then she pulled it back and I read it. It was super cool."

"Super curious to know if it's gonna be a dwarf baby or not," added Zach. "[Whether he/she will] come out with some sort of dwarfism. That would be a super emotional time for me."

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Tori shared that her pregnancy cravings have revolved around gummy bears, but that she's balancing out the candy by eating a ton of apples.

The couple tied the knot in Portland, Oregon, in July last year and can't wait to start their new family together.

"We're gonna be great parents," said Tori, in the video. "I can't wait."