Bindi Irwin has revealed that she and husband Chandler Powell are expecting a baby girl.

The 22-year-old daughter of the late Steve Irwin shared a snapshot alongside a giant tortoise and her husband, who was holding a sonogram of their unborn child.

Bindi captioned the adorable post: "Baby girl, you are our world. Our beautiful daughter is now about the same size as a hatchling Aldabra tortoise and is as healthy as can be. We can’t wait for her arrival next year."

Chandler, 23, also shared the photograph and wrote: "Our little girl and my beautiful wife are my entire world.

"I'm so excited to meet our daughter when she's born next year and to see the incredible person she will grow up to be."

Bindi Irwin has revealed that she and husband Chandler Powell are expecting a baby girl

Their fans went wild for the news and offered heartfelt congratulations and shared their excitement too.

Taking to the comment section, one of Bindi's 3.9 million followers penned: "How gorgeous!!!! What a lucky little princess!"

Another added: "So exciting! You’re going to be an incredible Mum!"

A third gushed: "The best news ever! I'm crying!"

While a fourth posted: "'So exciting. Congratulations both!"

The expecting parents are over the moon to be expecting a baby girl

Bindi and Chandler announced their pregnancy news in August with another Instagram post, in which they were holding a tiny Australia Zoo uniform.

"Baby Wildlife Warrior due 2021," they wrote. "Chandler and I are proud to announce that we're expecting! It's an honour to share this special moment in our lives with you."

"Though I'm still in my first trimester, we really want you to be part of our journey from the beginning of this new life chapter.

Bindi and Chandler announced their pregnancy news in August with another Instagram post, in which they were holding a tiny Australia Zoo uniform

"We couldn't wait to share the news as this beautiful little being has become the most important part of our lives. Your support means the world to us.

"Please let me know your best advice and send good vibes & prayers to our little sweetheart. Love & light."

Bindi’s brother, Rob, 16, is very excited to become an uncle and was one of the first people to comment on the gender reveal post and wrote: "I can’t wait to meet my niece."

The couple got married in March this year at Queensland's Australia Zoo, where they work and live, and managed to squeeze in their ceremony before COVID-19 lockdown restrictions were put in place in the country.

Bindi paid tribute to her Crocodile Hunter dad - who was killed by a stingray in 2006 - at the ceremony when she lit a candle in his memory.