Former rhythmic gymnast Son Yeon-jae will get married in August.
Her agency said last week that Son will tie the knot with her boyfriend, who is nine years her senior and not in the public eye.
The couple will have a private wedding with only their families and close friends.
When dating rumors started to spread last month, the agency admitted that she has been seeing someone since early this year but it did not disclose details.
Son finished fifth in the individual all-round competition at the 2012 Olympic Games in London and fourth at the 2016 Olympics in Rio de Janeiro.
Since retiring from the sport in 2017, she has appeared on a couple of TV shows and performed at galas. She also opened her own gymnastics academy.