To which Chandler, 22, immediately replied, with his own loving response.
"This made my entire day. I love you so much. Thank you for being the kindest and most amazing girl a guy could ask for❤️" he commented on the post.
Fans were quick to comment that the pair are perfect for each other and should make it official.
"Pop the question Chandler!!!" said one excited fan.
Another agreed: "PUT A RING ON IT, CHANDLER."
"Am I the only one who gets excited every time they post thinking it's an engagement," commented another.
The couple have been together for six years, but have said they are in no rush to marry.
Speaking to PEOPLE in the past, Bindi said: "For us at the moment, I think it's just been about enjoying life."