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Eagle-eyed fans were quick to notice the accessory, with one commenting: Hello Mr and Mrs P with a love-heart emoji.
Meanwhile, another said Patrick was a lucky man . Lucky man : Pia s eagle-eyed fans were quick to notice the ring, with one commenting: Hello Mr and Mrs P with a love-heart emoji
This is not the first time Pia has fuelled rumours of a secret marriage.
Last month, the Chilean-born star shared a photo to Instagram of herself holidaying in Cabo, Mexico, considered one of the ultimate honeymoon destinations.
In the sun-drenched selfie, the former Home and Away actress flashed a diamond band on her left wedding finger.
Former Home and Away star Pia Miller is spotted boarding a private jet in Sydney
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Pia Miller, Patrick Whitesell: Actress is shredding for the wedding
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She shared a number of black-and-white photos of the couple enjoying a smooch in the car.
Elsewhere, Pia shared a throwback photo of herself at the Eiffel tower in Paris, writing: I love France. Cannot wait to travel again.
Memories: Elsewhere, Pia shared a throwback photo of herself at the Eiffel tower in Paris, writing: I love France. Cannot wait to travel again. Pictured: Pia and Patrick
She also shared a photo of her family talking about the saying she couldn t believe her eldest son was an adult.
Pia and Patrick have been spending time together as the couple prepare to get married.