Sienna Miller flaunts her slender pins in eye-catching blue bikini during ...

She's known for her incredible sartorial displays at award shows and at enviable A-list soirees.

And Sienna Miller continued her stylish appearance as she swapped the red carpet for an idyllic day at sea with pals in Positano, on Saturday.

The 36-year-old Factory Girl star showcased her enviable holiday as she slipped into a vibrant blue bikini that highlighted her lithe figure.

Idyllic: Sienna Miller continued her stylish appearance as she swapped the red carpet for an idyllic day at sea with pals in Positano, Italy on Saturday

Idyllic: Sienna Miller continued her stylish appearance as she swapped the red carpet for an idyllic day at sea with pals in Positano, on Saturday

Sienna, who is currently based in New York, looked sensational in her ribbed spaghetti-strapped bikini top which accentuated her narrow waist and taut midriff while she luxuriated in the sun.

The star's skimpy bikini bottoms highlighted her lean legs and posterior as she stood and chatted to pals onboard her wooden speed boat. 

The screen siren left her blonde locks loose in a tousled curl and sported a pair of kooky oversized shades while a mix of beads and a gold pendant draped around her neck. 

Bikini babe: The 36-year-old Factory Girl star showcased her enviable holiday fashion as she slipped into a vibrant blue bikini that highlighted her lithe figure

Bikini babe: The 36-year-old Factory Girl star showcased her enviable holiday fashion as she slipped into a vibrant blue bikini that highlighted her lithe figure

Bikini babe: The 36-year-old Factory Girl star showcased her enviable holiday as she slipped into a vibrant blue bikini that highlighted her lithe figure

Sun-soaked: The Hollywood star's skimpy bikini bottoms highlighted her lean legs and posterior as she stood and chatted to pals onboard her wooden speed boat

Sun-soaked: The star's skimpy bikini bottoms highlighted her lean legs and posterior as she stood and chatted to pals onboard her wooden speed boat

Ready: Sienna had a pal rub sun cream on her back while she sat out in the sunshine

Ready: Sienna had a pal rub sun cream on her back while she sat out in the sunshine

Ready: Sienna had a pal rub sun cream on her back while she sat out in the sunshine 

Catching up: Sienna happily chatted to friends onboard their luxury boat

Catching up: Sienna happily chatted to friends onboard their luxury boat

Pin-credible: She highlighted her slender pins while applying her sun cream 

Pin-credible: She highlighted her slender pins while applying her sun cream 

Earlier in the day, Sienna sported a loose-fitting blue dress that showcased her shoulders and decolletage. 

She teamed the oversized garment with double buckle strapped pair of sliders and carried a monochrome-coloured floppy hat in her manicured hands.

The natural carried a vibrant yellow leather

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