The model and 'Instagram IT girl' proudly paraded her unique engagement ring as the happy couple sipped champagne and posed for selfies to share on their social media feeds to announce the news.
Reality star Oliver captioned a pic of the pair: “SHE SAID YES!!! SHE IS MAKING AN HONEST MAN OF ME. GREATEST MOMENT OF MY LIFE.”
Connolly, a 26-year-old model from Scotland, confirmed the news, sharing the same picture as her fiance with the caption: “And then I said yes. and split my jeans from excitement.”
Hours earlier, Proudlock posted a loving message on Twitter as he and Connolly marked four years together.
He wrote: “To the best 4 years of my life, and to many more to come. Love you more than I could ever comprehend.”
Proudlock, a graduate of Eton College who now works as a fashion designer, joined Made In Chelsea in 2011.