Irwin and Powell married in a small ceremony at the Australia Zoo without guests on March 25 -- hours before a new restriction in Australia went into effect, limiting weddings to just five people, including the couple, the witnesses and the celebrant.

Irwin's mother, Terri, and younger brother, Robert, attended the ceremony.

Crowe appreciated Bindi's message on his birthday, sending her well-wishes in return.

\"Thanks Bindi. Still amazed at how your ninja goddess mum @TerriIrwin got your wedding done just under the wire of isolation !!\" he wrote. \"She’s amazing.\"

Thanks Bindi.
Still amazed at how your ninja goddess mum @TerriIrwin got your wedding done just under the wire of isolation !!
She’s amazing.
So happy for you & Chandler .
Hope that complex and beautiful tree offers grace, shade and shelter to you & the many generations to come!! https://t.co/BA4KQisuWD

— Russell Crowe (@russellcrowe) April 7, 2020

He added that he is \"so happy\" for the couple and that he hopes the fig will offer, \"grace, shade and shelter to you & the many generations to come!!\"

Read more about Bindi's wedding ceremony here and the way Robert Irwin honored his late father at the wedding here.

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