Bindi Irwin pens emotional note to late father Steve Irwin as she prepares for wedding

'I wish you could be here for these moments, but I know that your spirit lives on in us'

(Getty Images)

Bindi Irwin has written a heartfelt note to her late father, conservationist Steve Irwin, as she prepares to walk down the aisle.

On Wednesday 24 July, Ms Irwin announced that she had become engaged to her partner of six years, former professional wakeboarder Chandler Powell, on her 21st birthday.

The proposal was covertly photographed at Australia Zoo by Bindi's younger brother, 15-year-old Robert Irwin, who will accompany his sister down the aisle.

On Friday, Bindi shared a post on Twitter and Instagram in tribute to her father, detailing how proud she believes he would have been to witness his son playing such an important role at the wedding.

"Dad, you would be so incredibly proud of Robert. He has been such an amazing support during this beautiful new life chapter," the 21-year-old conservationist wrote.

"I know you'd be beaming with pride when the time comes that he walks me down the aisle.

"I wish you could be here for these moments, but I know that your spirit lives on in us."

In her social media post, Bindi shared a photograph of herself and Robert as children with their parents, Steve and Terri Irwin.

Steve Irwin died in September 2006 at the age of 44 after being pierced in the heart by the barb of a short-tail stingray.

His daughter was eight years old at the time, and his son was just under three years old.

Several social media users commented on Bindi's posts expressing their admiration for her father.

"There's no doubt in my mind your dad's famous enthusiasm is entwined within each moment in the lives of the wonderful children he and Terri created," one person wrote on Instagram.

"I'm so emotional right now. Your dad's work was a huge part of my childhood," another added.

"He would be so proud of you and your family. Congratulations on your engagement! Your dad is smiling down on you."