Elle MacPherson, 59, shows off her toned physique in a backless

The Australian model, 59, sent pulses racing as she posed in a backless swimsuit for a racy Instagram post on Sunday.

Elle Macpherson, 58, Shares Timeless Bikini Pic

Supermodel Elle Macpherson shares the secrets behind her body as she celebrates turning 55

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Makeup free Elle Macpherson, 59, looks years younger as she and her rocker boyfriend Doyle Bramhall wear matching outfits during a stroll in Sydney's Northern Beaches

Elle Macpherson, 58, Shares Timeless Bikini Pic

Elle Macpherson and boyfriend Doyle Bramhall wear matching boho outfits as she shows him around Bondi

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Rebecca Adlington shows off her baby bump in tight white vest and leggings

Elle Macpherson flaunts her toned frame for InStyle shoot

Makeup free Elle Macpherson, 59, looks years younger as she and her rocker boyfriend Doyle Bramhall wear matching outfits during a stroll in Sydney's Northern Beaches