Olivia isn't Dunne modeling for Sports Illustrated -- the superstar LSU gymnast will grace the pages of the magazine for a second-straight year ... earning the title of "rookie."
The 21-year-old social media influencer was just announced as one of the models receiving the distinction for the 60th anniversary of the swimsuit issue ... putting her in the company of big names like Olivia Culpo, Brooks Nader, Emily Ratajkowski and Kate Upton, who are all former rookies for the publication.