GOIN' FOR GOLD
Team USA superstar Suni Lee is adding to her stacked résumé -- the Olympic gold medal-winning gymnast is now a Sports Illustrated Swimsuit model!!
The publication made the huge announcement on Sunday ... saying the 21-year-old will make her print debut in 2025.
Lee -- who has racked up two golds, a silver and three bronzes in her Olympic career -- rocked a black bikini for some snaps in Boca Raton, Florida ... and she looked incredible.
Lee will be one of many athletes to appear in the upcoming issue .