Chandler's sweet tribute to Bindi

They've been going strong for three years and it seems Bindi Irwin and boyfriend Chandler Powell are still very much in the honeymoon stage!

Loved-up Wildlife Warrior Chandler took to Instagram to celebrate "National Girlfriend Day", writing a sweet tribute to Bindi and sharing a throwback photo of the cute couple.

"Happy #NationalGirlfriendDay. Couldn't imagine going on these incredible adventures with anyone else. Thank you for making every moment so precious," the 20-year-old captioned the snap of himself and Bindi sharing a watery hug.

Awww, ain't young love grand!

Of course this isn't the first time Chandler has expressed his love for the late Crocodile Hunter's daughter, recently dedicating a sweet post to Bindi on the eve of her 19th birthday last week.

"Happy Birthday for tomorrow to the kindest, strongest, most beautiful soul I have ever met. We have been together for years now and loving you will always be the greatest blessing," the American native wrote.

"Every day I aspire to be more like you in the way you work tirelessly for what you believe in and the people you love most, all while carrying the most gorgeous smile. After all the adventures we have experienced together, I can only imagine what the years to come will hold.

"You make me smile bigger than I ever knew was possible and give me the most amazing memories that I will carry with me forever. I love you. Happy birthday sweetheart."

They're too cute, our hearts can't take it!

Earlier this year Bindi revealed that her boyfriend would have easily gotten approval from her dad Steve Irwin, who sadly died back in 2006.

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"My dad was actually the most protective though 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," Bindi recalled to the Today Show.

However, the passionate conservationist added that Chandler has easily passed Steve's requirement!

"Luckily Chandler wakeboards, he can board across the pond [with] no worries at a all," Bindi added with a laugh.

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