Heartwarming moment woman hides below deck on a yacht so she can photograph the moment her sister gets engaged - and the reaction when she's discovered is priceless

  • Adelle Cerna hid in a yacht cabin to film her older sister Alice getting engaged
  • Ms Cerna showed her covert mission to capture the perfect snap on TikTok  
  • The video shows her hiding in the bottom-deck of the boat off Adelaide's coast
  • When her sister Alice's boyfriend Daniel proposes, she pops up to take a photo 

A dedicated sister hid in the cramped bottom-deck of a yacht to film the moment her older sibling got engaged.

Adelle Cerna and her sister's boyfriend Daniel hatched a plan for her to lie in wait to capture him proposing to her sister Alice on a romantic boat trip off the coast of Adelaide.

Ms Cerna recreated in a TikTok video how she carried out her covert mission to snap the perfect shot on Alice and Daniel's special day in November last year.

After she sneaking onto the boat, Ms Cerna peers out the lower cabin's window to catch a glimpse of the view as the yacht heads from the pier out to sea.

Adelle Cerna (pictured) has shared footage of her hiding in a yacht's bottom deck to photograph the moment her older sister and soon-to-be brother-in-law got engaged

Adelle Cerna (pictured) has shared footage of her hiding in a yacht's bottom deck to photograph the moment her older sister and soon-to-be brother-in-law got engaged

As the loved-up couple dance and drink champagne on the top deck, Ms Cerna passes time by dancing, trying to eavesdrop through the door, and sitting on the bed twiddling her thumbs.

Finally, Daniel pays her a visit in the lower deck to fetch the ring and a letter, with the pair excitedly hugging as he braces to return upstairs to Alice and pop the question. 

Ms Cerna secretly inches her head up through a door in the cabin to photograph Daniel on one knee as he offers his girlfriend a diamond-studded ring. 

Excitedly proclaiming 'yes', Alice clasps her face with both hands as she sheds happy tears, before the newly-engaged couple embrace, slowly dancing on the spot. 

But the romantic moment is abruptly interrupted by laughter after Alice turns to see her sister behind a camera lens, hovering above the cabin door.

Ms Adelle inched her head up through a cabin roof-top door to photograph Daniel proposing to Alice (pictured)

Ms Adelle inched her head up through a cabin roof-top door to photograph Daniel proposing to Alice (pictured) 

'Is that my sister?!' Alice laughs as she points at Adelle, who remains professional, photographing away.

The clip ends with Adelle filming her self sipping on a glass of champagne in the bottom-deck, trying to be discrete, as the betrothed pair continue their date.  

The video racked up more than 3.7million views, with many praising Adelle's heartwarming bond with her sister and future brother-in-law.

'You were so committed!' one person wrote.

'This is the best! You're such a good sibling!' another added. 

'The way you and your brother in law hugged when he grabbed the ring,' a third wrote alongside love eyes emojis.

'This is so magical. What a wonderful sister you are,' a fourth person wrote. 

Ms Cerna was eventually spotted spying (pictured) by her sister, who erupted into laughter

Ms Cerna was eventually spotted spying (pictured) by her sister, who erupted into laughter 

Woman hides on yacht's bottom deck to photograph the moment her sister gets engaged

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