"We held a small ceremony and I married my best friend", she wrote.
The couple had their wedding already, and the whole of the previous year, but that was due to the global outbreak of the virus, all the preparations are over, and the only family members at their wedding, let them.
The post continued, "This was a very hard decision but important to keep everyone safe".
Speaking to the Sunshine Coast Daily, she explained: 'I do really wish that dad was here to be able to celebrate with us as a family.
Powell posted the same sweet photo of them on the altar on Instagram with his own message of joy. "You know, if you are missing someone, I think it's helpful to know that scientifically you can't actually create or extinguish life, you can only change its form", she said, adding, "so if you are grieving someone you loved very much, look to science and just remember that when you boil the kettle and steam comes out, it doesn't mean the water has gone".
"As we embark on this new life chapter I hope that we can share some love in the world, especially during this challenging time".
Irwin first met her U.S. born husband in 2013, with the Dancing with the Stars victor holding United States citizenship herself as her mother Terri is originally from Oregon. "Your love shines bright in a world that needs a lot of hope and love right now".
"Sadly, also, and I know this will be very hard, funerals to no more than 10 persons observing the rules around the four-square-metre rule and the social distancing practices".
The conservationist and reality TV star got engaged to Powell in July after almost six years together.
Bindi and Chandler have always wanted to marry at Australia Zoo. Afterwards Bindi shared a candy tribute to her late father Crocodile Hunter star Steve Irwin, who died after being attacked by a stingray in 2006.
Bindi and Chandler had documented their wedding planning journey since last summer on social media.
"Even though all of your wedding plans had to change at the last minute to keep everyone safe and healthy, it truly was an emotional and beautifully spontaneous day".
Bindi and Chandler chose to marry at the Australian Zoo because it was there that they were first introduced.
She also addressed the timing of the wedding amid the novel coronavirus pandemic.
"Today we celebrated life and revelled in every lovely moment we shared together in our Australia Zoo gardens", Bindi added.
Her little brother Robert walked her down the aisle on a day that was filled with "smiles and tears".
Irwin also described that her family is "fortunate" because they all live at the Australia Zoo, so they could be together to celebrate the couple's special day.