Geri Horner. Actress: Spice World. Geraldine Estelle Horner (née Halliwell; born 6 August 1972) is an English singer, songwriter, author and actress. She rose to prominence in the 1990s as Ginger Spice, a member of the girl group the Spice Girls. With over 100 million records sold worldwide, the Spice Girls are the best-selling female group of all time. Their slogan "girl power" was most closely associated with Halliwell,and her...