The 43-year-old former baseball player posted a photo of the huge diamond on JLo's left ring finger, captioning the snap, "She said yes".
The couple had recently celebrated two years together.
Interestingly, Lopez tagged Ellen DeGeneres in her post of the photo.
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Aside from the lovely words, Rodriguez added a "Lit" stickers, further hinting at the fact he was proposing later in the day while the pair enjoy a relaxing tropical vacation.
The pair began dating in February 2017, per ET, and have been all over social media and celebrity-occupied events ever since.
Rodriguez retired from Major League Baseball in 2016, after a lengthy career, mostly with the New York Yankees. They all want a romantic comedy, a happy ending. Rodriguez's daughters, Natasha and Ella, are from his marriage to Cynthia Scurtis, which ended in 2008. "We couldn't have asked for anything better than the four of them getting along as they do".
Lopez has been married and divorced three times, including a high-profile split with singer Marc Anthony.