The Olsen Twins
Mary-Kate and Ashley Olsen were everywhere in the late '90s and early 2000s. They often appeared together as a dynamic duo or playing the same character.
After their iconic roles as Michelle Tanner in Full House, the twins continued to act for a while. Nowadays, you're more likely to see them in the fashion world as designers. However, they are still involved in the film industry, running Dualstar Entertainment Group, a film distribution company.