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Bindi Irwin has been killing it on "Dancing With the Stars" and has quickly earned the adoration and support from fans, viewers and the judges.

However, from the start of the season, the 17-year-old star, who is the daughter of the late Steve Irwin, has always been able to count on the love and support of her boyfriend Chandler Powell, 18, whose been cheering Bindi since the beginning.

WATCH: Bindi Irwin's Boyfriend Adorably Cheers Her On From 'Dancing With the Stars' Audience

Chandler flew into LA to support Bindi two weeks ago, but the couple has been making their relationship work long distance. Speaking with ET, Bindi opened up about how they stay strong and happy together.

"I am one of those old fashion people and I love to write," Bindi said, revealing that she keeps it old school when it comes to expressing her emotions to Chandler. "So, I write a lot. Like hand-write letters. I write lots and lots of letters."

Forget Instagram or email, it looks like hand-written love letters really are the way to go for this super-cute couple.

WATCH: Bindi Irwin's Boyfriend Sends Her a Sweet Birthday Message

Although that doesn't mean Instagram doesn't have its uses for the two of them. Chandler, a professional wakeboarder, often shares pics of the two of them together and shared the sweetest birthday message for Bindi back in July, writing, "[I] feel very blessed to have you in my life."