Serena Williams just got engaged to a guy who co-founded Reddit, and then announced it on his platform.
Serena took to Reddit Thursday morning to break the news to the whole world in the form of a poem ... she'll soon be the wife of 33-year-old Alexis Ohanian.
The tennis star detailed her story in a Reddit post, saying Alexis popped the question with a surprise trip to Rome -- where they apparently first met. She said he took her to the exact same table where they first talked ... and got on one knee.