Jeremy Roloff is going to be a first-time dad.

The 26-year-old Little People, Big World star confirmed wife Audrey Roloff is pregnant with their first child following word his twin brother, Zach Roloff, is also expecting.

"The secret is out... I'm going to be a dad! The author and creator of life has entrusted us with our first child - wow," Jeremy captioned a photo on Instagram of himself and Audrey with a sonogram.

"Inevitably this means some big exciting changes for us this year, we're excited to embark on this journey and share it with you all. We're praying for a healthy baby Roloff!" he added.

Audrey had shared the news in a post the same day, writing, "We've been keeping a secret... and now the secret is finally out! WE'RE PREGNANT!!!!!" She told Us Weekly she discovered her pregnancy the same night Zach announced his baby's sex at a family party in January.

"I was so surprised," she told the magazine. "It didn't hit me until I heard the heartbeat at our first doctor's appointment."

"My dad teared up and my mom screamed," Jeremy added of parents Matt and Amy Roloff. "We love the idea of a big family."

Zach had announced in November that he and wife Tori Roloff are expecting a baby. The couple told fans in January that they are expecting a baby boy.

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"It's a... BOY! Zach and I are so excited to finally find out what we are having! We are so blessed to be able to share the moment with such close friends and family," Tori wrote at the time.

The Roloffs came to fame on Little People, Big World, which premiered an 11th season on TLC in November. Zach, Matt and Amy all have dwarfism and stand under 4'3" tall, while Jeremy and siblings Jacob and Molly are of average height.