Kirk announced his happy news via Twitter on Friday afternoon (12 July), posting a picture of himself cuddling Cami as she proudly flaunted her gorgeous engagement ring for the camera. Good choice, Kirk!
The caption read: "She said yes!"
Cami then retweeted Kirk's picture and message with the caption: "It's true! I love you, FOREVER. Stuck with me!"
Neither have revealed any details about how Kirk popped the question yet.
Plenty of fans have been sending their congratulatory messages via Twitter this afternoon, with one saying: "So happy that @CamiLiModel and @kirk_official are engaged! You's are gonna make beautiful babies."
Kirk and Florida-based Cami have kept their romance relatively low-key, but they are thought to have been in a long-distance relationship for several months.
Cami jetted into the UK to spend time with Kirk this week. The couple were reunited on Monday, 8 July, when Kirk collected his US model love from the airport. He later described her as his "soulmate".
Things between the couple appeared to turn serious last month, when they had matching tattoos inked during a holiday to Las Vegas.
With Cami being based in the US, we wonder if Kirk will be leaving our shores?
Congratulations to Kirk and Cami!
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Copyright: Instagram Mark Wright