Calliope Iphegenia "Callie" Torres, M.D. is a fictional character from the medical drama television series Grey's Anatomy, which airs on the ABC in the United States. The character was created by series' producer Shonda Rhimes, and is portrayed by Sara Ramirez. She was introduced in season two, as a senior orthopedic resident, as a love interest for intern George O'Malley (T.R. Knight). Eventually becoming an attending orthopedic surgeon, the character was originally contracted to appear on a recurring basis, but received star billing in the third season.