The couple shared the beautiful news to Instagram, with an adorable video of the actual moment.
She captioned: 'The most romantic moment of my life! 😍💎 #Engaged 👰🏼'
Ever since Hilton has been sharing photo after photo of her gorgeous engagement ring.
Costing the 32-year-old model and actor a whopping $2mill, the pear-shaped ring is just over 20 carats and was designed by celebrity jeweler Michael Greene.
'Paris at one point in time told Chris she really loved her mother’s pear-shaped diamond, and when Chris came to me that was his request,' Greene told PEOPLE. 'The pear-shaped really jumped out for him and ultimately for her. He did some fishing, but in the end it was all him. He’s a smart guy, and hangs out a lot with the family, and I think she realized how much she liked her mom’s ring.'
Greene shared three beautiful pics of Paris' new ring - and it's truly breathtaking.
He wrote: 'Congratulations Chris Zylka & Paris Hilton on your engagement! It was a beautiful moment and truly an honor to help make your dreams come true. We wish you all the best, and Happy New Year!'
Paris has also been posting non-stop pics of the stunning jewel!
Hilton PEOPLE: 'The ring was so gorgeous and sparkling. I was shaking as I put it on. It is the most beautiful ring that I have ever seen!'
Congratulations to the couple on their engagement.