Jamie Laing's fiancée Sophie Habboo turned blue and "nearly died" earlier this month.
The 'Made in Chelsea' star - who revealed last week he and Sophie are engaged - had to rush his 28-year-old significant other to hospital after she vomited and her lips and fingers "went blue", and she was found to have "seriously low" oxygen levels.
Speaking on his 'Private Parts' podcast, he said: "I got engaged and my fiancée nearly died, Sophie came in screaming.
"We spend the day together and have a great day together and we go for lunch the next day on Sunday with Sophie’s sister and boyfriend Tom. It’s been wild this whole weekend, champagne everything. We had a bottle of champagne and Sophie ordered oysters.
"We get a bit drunk and go to bed that night and we wake up in the morning. When I woke up at 5am in the morning, Sophie was throwing up in the loo and I thought maybe she’s got food poisoning.
"We drank a lot but not extortionate. She then gets back into bed with me and she falls asleep and we get up around 7.15am, Sophie then starts puking on my shoulder.
"I clear her up and get her to the bathroom, we go downstairs and her lips are looking a little bit blue.”
"Then we start doing the podcast but half way through the podcast, Sophie’s lips and fingers have gone blue. I’m quite good in situations like that but I was scared.
"I ran her to the hospital, the hospital was rammed full of people and I sat her down and her fingers and lips were going bluer and bluer.
"I was trying to get people’s attention to look after her and they said you just have to wait, but she was turning blue. She was crying tears into her face mask. I’ve never had fear like that in my life ever. We checked her oxygen levels and it was really low."
Jamie admitted it was a terrifying time, and they are still unsure as to what caused it.
He added: "She had to be put on oxygen and on a drip and her oxygen levels were seriously low, we don’t know what it came from.
"We were in the hospital for seven hours and we got her oxygen back up.
"It was the most intense four days I’ve ever had in my entire life. She was turning blue, blue lips and fingers. I was screaming in there asking if anyone could help us."