Dame Joan Collins had a surprise in store for her Instagram fans this week.MORE: Dame Joan Collins stuns in family photo with her children and sister Jackie's daughterThe 89-year-old shared a stunning snapshot showing her posing in a plunging red and black lace bodice, teamed with a military cap and a fur coat. WATCH: Joan Collins, 89, dances around in a bikini!Joan looks fabulous in the throwback image as she showcases her curves – and, understandably, her followers went wild for the post.READ: Dame Joan Collins pictured with her rarely-seen brother Bill - fans reactMORE: Dame Joan Collins, 88, is age-defying as she shows off endless legs on holidayThe image shows her in character as Fontaine Khaled in the 1979 movie The Bitch – based on the novel by Joan's late sister Jackie Collins.A post shared by Joan Collins (@joancollinsdbe)Joan stunned fans with her bold pictureJoan wrote in the caption: "I hear they are reissuing The Bitch as it made a lot of money.