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.

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.

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.