Australian fitness influencer Stephanie Miller, formally known as Stephanie Claire Smith, has announced her second pregnancy in an emotional Instagram post.

The young entrepreneur posted an adorable photo of her family holding her pregnant stomach and captioned the post, “Harvey’s going to be a big brother”.

Mrs Miller had her first baby, Harvey, in 2021 with her husband Josh Miller.

The pair married in 2019, hosting a chic wedding along the Murray River.

Friends and family flooded the comments congratulating the young mum.

“Congratulations this is amazing news ❤️❤️❤️,” one user wrote.

Another friend wrote, “THE MOST WONDERFUL NEWS EVER!! Cannot wait to meet bub ❤️❤️🙌❤️🙌❤️🙌❤️ so happy for you guys x.”

“Still so freaking excited for you my girl,” said a third.

The soon-to-be mum of two co-founded the Keep it Cleaner fitness app alongside Laura Henshaw, she also co-hosts the @kicpod and @kicbump podcasts.

Mrs Smiller is also recognised on Forbes Australia’s 30 under 30 list.