Health and lifestyle coach Sabrina also shared the exciting news with her followers, posting a video and three photos of the enormous oval-shaped sparkler.
The unexpected news comes weeks after Khloe revealed on an episode of Keeping Up With The Kardashians that despite calling time on their four-year marriage, she misses him daily.
"So, he called me and he was like, ‘I just knew we were all gonna talk again at some point. I’m just so happy.’ He was like, ‘I would love to see you. I’ve been dying to see you in person. I just feel like we have so much to talk about.'”
“I really don’t know what the right thing is to do in this situation,” she also admitted in a confessional interview.
Khloe went on to discuss Lamar's infamous overdoes, admitting that despite being separated at the time, she stayed true to their marriage vows and helped him "through sickness and health".
"I always felt after, I think this overdose, that I did everything in my power to be there through sickness and health," she said through tears."Once I saw that he, you know, wasn't in the headspace to really want to change his bad situation then I was fine letting him go."
In Lamar's tell-all memoir, Darkness to Light: A Memoir, he writes about his turbulent relationship with his ex-wife, admitting he threatened to kill Khloe while on a drug-fuelled bender. In the shocking chapter, he recalls being high on ecstasy and cocaine in his "man cave" when he "forcefully" grabbed Khloe after she called his friends for help because he was hallucinating.
“Khloe came down and knocked on the door. I opened it suddenly and grabbed her forcefully by the shoulders, which frightened her. ‘What the f**k are you doing?’ I screamed, out of my mind. ‘You trying to embarrass me in front of my friends? I’ll f**king kill you! You don’t know what I’m capable of!'”
“I’m pretty sure she had to be scared at that point in time,” he said. “I’m thinking about it now, like, I couldn’t believe how I was treating that queen like that."