Sienna Miller looked incredible as she celebrated Cara Delevingne's 30th birthday on a lavish yacht in Formentera, Spain

The actress, 40, showed off her toned and tanned physique in a tiny chocolate brown bikini while soaking up the sun during the boat party.

She opted for a natural makeup look underneath a stylish pair of sunglasses while accessorizing with dainty gold jewelry.

Sienna Miller styled her short blonde locks in loose waves before rocking the wet hair after taking a dip in the sea.

As well as displaying her figure, the actress also showed off her impressive diving skills as she was seen plunging into the water.

Link to story: https://bikininewsdaily.com/bnd/SiennaMillerlookedincred-3209