Revealed: The hilarious plot behind Bindi Irwin's engagement

Bindi and Chandler on the day he proposed. Little did the world know Bindi's brother Robert had quite the hand in making it all come together. Photo / Instagram

Bindi Irwin announced her engagement to the world with a series of beautiful images capturing the moment Chandler Powell proposed to her.

But behind every great engagement snap is a cunning plan to ensure it all goes right - at least that was the case for Irwin thanks to her brother, Robert.

View this post on Instagram

The most beautiful surprise. Chandler and Robert worked together to capture the moment I said ‘YES’. We were in the gardens of Australia Zoo and it was beyond perfect. I never even knew Robert was there photographing and I’ll always be grateful to have these special memories of the most amazing day of my life. ❤️

A post shared by Bindi Irwin (@bindisueirwin) on Jul 24, 2019 at 5:04pm PDT

During an appearance on The Tonight Show, the 15-year-old conservationist revealed that there was some specific planning he carried out to make sure he got the perfect shot for his sister – and it produced some hilarious outtakes.

Robert shared with Tonight Show host Jimmy Fallon how Powell wanted to pop the question at the Australia Zoo. What this meant for Robert was hiding in the bushes to capture the moment without being noticed.

But instead of just waiting in the shrubs and hoping for the best on the day, Robert decided to rehearse the scene, to make sure he had everything lined up correctly.

What's more, Robert decided he should act as a stand in for Bindi as Powell practiced going down on one knee to propose.

Robert Irwin decided he needed to stand in as his sister in order to line things up for her surprise proposal. Photo / YouTube

"I stood in for Bindi and mocked up where he was going to propose," Robert told Fallon as he showed the snap on the show.

"Bindi hasn't even seen this photo," he added, joking that "it was the happiest moment" of his life.