Millie Bobby Brown "had a feeling" she was going to get engaged on holiday - but didn't expect the proposal to take place underwater.

The 20-year-old actress is set to tie the knot with model Jake Bongiovi - who is the son of music legend Jon Bon Jovi - and the pair were enjoying a family vacation in the Maldives and while she thought he might pop the question at some point during the break, was taken aback when it all happened during a scuba diving session.

Speaking on the 'Table Manners' podcast, she told hosts Jessie and Lennie Ware: "Basically, I was on holiday with my parents and Jake. I had a feeling; I packed a white dress just in case, let's just say that, and I had my [nails] done in the way I wanted.

"I don't like surprises, I usually know when one is coming. There were conversations before we left about proposals and what I would like, what I wouldn't.

"I thought it would be a very good place to choose. We were in the Maldives, so Jake and I were diving one morning, his parents were there. "He just asked if I could be up at 8am to be up for a dive.

" And the night before, I said 'Could we cancel that?' and he said no, and he never really says that.

"A few months before, he said he would never propose while diving. There was a video we saw online and he said 'I'd never do that because if you got too excited, you wouldn't be able to breathe', so I was like 'Well, that's a good point.'

"And I thought he wasn't going to do it and then when I went under - it was actually an hour of diving - before he did it".

But the 'Stranger Things' star was so excited and dropped the ring in the heat of the moment, which prompted her husband-to-be to do a heroic "swoop" to the seabed and grab it as she floundered and panicked that it had disappeared forever.

She said: "I was taking really deep breaths because I was so excited and then we floated to the top. He dropped the ring, well, I dropped the ring because I went to show him and it slowly slid off. I probably could've stopped it and then nothing was slow about this plummet. It plummeted so fast, so quickly. I really, truly, thought it was gone.

"I watched it fall to the bottom of the ocean. He saw it happen, which I'm so proud of him [for], he just threw himself so deep underwater and did this cinematic swoop and when he opened his hand, it was in there."