“This time he made it not by chance / But by choice / Down on one knee / He said 4 words And / isaidyes,” she wrote at the time.
She dropped the bombshell news on a thread on her love’s website, Reddit.
The two have yet to announce a wedding date.
Williams has four Gold Medals, one from winning the singles at the 2012 London Olympics and three thanks to doubles wins at the 2000 Sydney Olympics, 2008 Beijing Olympics and the 2012 London Olympics.
The Florida-native has been ranked No. 1 by the Women’s Tennis Association in the singles on seven occasions between 2002 and 2017.
In 2016, she was named the Best Female Tennis Player at the ESPY Awards and in 2015 she was named Sports Illustrated Sportsperson of the Year.