Bindi Irwin's boyfriend had to "cross toughest crocodile pond" to win her heart

Bindi Irwin has described her boyfriend as her "living sunshine" and revealed the test he had to overcome to win her heart.

The 18-year-old star - who is the daughter of Terri Irwin and the late Steve Irwin - gushed about her beau Chandler Powell in a sweet post on social media.

Alongside a heart emoji, she wrote: "Sometimes in life, you find that someone who is living Sunshine (sic)"

She also revealed that Chandler passed a test her rather had laid down before he died for any many who wished to date her.

Bindi revealed to Today Extra: "My dad was the most protective of anyone. He always said, 'Before Bindi is allowed to date, the guy has to cross our toughest crocodile pond', so he has to swim across the pond."

"And we're all grateful Chandler is a wake boarder," Bindi joked, "so he can wake board across the pond."

Bindi says she knew he was the one for her when she saw him in the khaki uniform worn by the team at Australia Zoo.

She shared: "It was kind of one of those moments that was a real defining moment for me because you know, it's only the people who are the closest to us that get their khakis. I love seeing [Chandler] in khaki now. It makes me so happy."

And the 18-year-old conservationist also revealed Chandler wrote a letter to her mother to ask if he can stay in touch.

She shared: "I met him and his family and went, 'Gee, he's not too bad, is he?' He actually wrote to my mum and asked her permission to stay in touch with me, which was lovely."

- Bang! Showbiz