Romanos III Argyros, or Romanus III Argyrus (Greek: Ρωμανός Γ΄ Αργυρός, Rōmanos III Argyros; 968 – 11 April 1034), was Byzantine emperor from 15 November 1028 until his death. He was a Byzantine noble and senior official in Constantinople when the dying Constantine VIII forced him to divorce his wife and marry the emperor's daughter Zoë. Upon Constantine's death three days later, Romanos took the throne.