In the cute snap, Chandler is pictured shirtless with boardshorts, cuddling up to a beaming Bindi.
Alongside the image Bindi wrote, 'April 2015 ❤️ We spent this day with our families smiling and laughing by the lake.'
'I am so glad we found each other in this great big world. I love you,' Bindi finished.
Powell also posted a photo today gushing about his 19-year-old girlfriend.
Posting a photo of the couple wearing T-shirts Bindi had designed, he captioned: ''In love with this girl and the shirts she designed!'
He continued, 'All profits from the shirts go directly back into supporting conservation work worldwide. When I’m not in my khaki, I live in this shirt and you should too! Click the link in my bio to get one for yourself and everyone you know for Christmas!🐊'
For months the young couple, who have been together for three years, have been at the centre of marriage rumours.
Chandler's grandfather most recently claimed that his family are eagerly awaiting engagement news.
'It's been a while now, they're on their time frame, but we're quietly waiting [for an announcement],' he said.