Brooks Koepka's wife, Jena Sims, just reached a major milestone in her modeling career -- she's going to be in the Sports Illustrated Swimsuit issue!!
The golf star's partner shared the big news on Friday ... revealing after a long audition process, she was one of seven finalists to get picked out of the 2023 open casting call to be a "rookie" in next year's magazine.
Sims was understandably emotional about the announcement ... saying, "I just cried in public."
"I think I'm still in shock.