Girl's adorable role in marriage proposal almost ends in disaster

The family stared in disbelief as the ring tumbled to the ocean. Photo / TikTok

An Australian dad was forced to dive into the ocean after the engagement ring in the middle of an adorable marriage proposal video.

Luke Aukuso made the fateful decision to include his daughter Harpie in the life-changing moment on a picturesque Brisbane pier.

A viral TikTok – with more than 200,000 likes – shows the all-important moment in which he asks his partner to marry him and the little girl begins to open the ring box.

"Look at mummy," Aukuso can be heard saying.

In the flash of an eye, the romantic scene changes as all three members of the family watch with wide eyes as the ring slips out of the box.

"Arghh, oh no!" they scream.

The horrified father grasps at the pier as the diamond ring falls through the cracks and plunges into the ocean below.

Watching the no-doubt expensive piece of jewellery sink into the depths, he springs to action, kicking off his thongs and seemingly diving into the water below.

"You can't jump, it's too shallow," yells the person filming the moment.

His fiancee Stephanie reported the good news to their TikTok followers that her husband-to-be had thankfully saved the ring.

"It was a six metre jump into about one metre of water on low tide, adrenaline hit him hard. Everything turned out perfect," she said.

TikTok users took to the comments section to share their reactions to the nightmare scenario.

"This why you don't get kids involved in wedding or proposal," one user commented.