The snap shows Worthingon (née Bingle) in a high waisted navy blue swim bottoms with a light blue bikini top.
The mother-of-two appeared fresh-faced with a minimal makeup palette.
Lara - who has been married to actor Sam Worthington, 42, since 2014 - recently gave fans a rare glimpse into her relationship with her Hollywood actor husband.
The pair share sons Rocket, three, and Racer, two.
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