Sharon Stone and Bo Derek pack a punch in plunging necklines at Muhammad Ali’s Celebrity Fight Night in Phoenix, Arizona

HOLLYWOOD stars Sharon Stone and Bo Derek chose knockout dresses for a charity boxing show.

Sharon, 59, who was exposed below the belt in Basic Instinct, just about contained her cleavage in a dress cut down to her navel.

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Seventies sex symbol Bo, also went the full distance with a plunging neckline – 38 years after her iconic beach scene in 1979 rom com 10, when she ran in slow motion along the sand in a nude swimming costume.

The actresses were among celebs at Muhammad Ali’s Celebrity Fight Night in Phoenix, Arizona.

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The annual event was the first since the heavyweight champ’s death in June last year.

Cash raised goes to the Muhammad Ali Parkinson Center at Barrow Neurological Institute.