<P> 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 . </P> <P> Torres was initially conceived as a love interest, and eventual wife, for O'Malley, and was created to be disliked by her colleagues . Further storylines include relationships between her and plastic surgeon, Mark Sloan (Eric Dane), cardiothoracic surgeon Erica Hahn (Brooke Smith), as well as a marriage to pediatric surgeon Arizona Robbins (Jessica Capshaw). The character's bisexual storyline with Hahn and Robbins, and her development later in the series has garnered much acclaim . </P> <P> Ramirez's portrayal of Torres has been widely praised by television critics and the character gained significant popularity as the series progressed . Ramirez was nominated for several awards for her portrayal of Torres, including the Image Award for Outstanding Supporting Actress in a Drama Series, and the ALMA Award for Outstanding Actress in a Drama Television Series . The character was ranked at no . 7 by AfterEllen.com in the list of "Top 50 Favorite Female TV Characters ." At the end of the show's twelfth season, Ramirez departed the show after ten years, desiring to take a break . </P> <P> Callie Torres is introduced as an orthopedic surgery resident with a crush on intern George O'Malley (T.R. Knight). The two start a relationship and Torres moves into Meredith's house (Meredith and Izzie Stevens lived there as well). Uneased at the way their relationship is progressing, O'Malley confronts her, which results in her moving into a hotel . In the aftermath of the breakup, she meets and has a one - night stand with plastic surgeon Mark Sloan (Eric Dane), who becomes her friend . Torres and O'Malley subsequently reconcile, and the two marry in Las Vegas on the spur of the moment . Confused, O'Malley confides to fellow intern Izzie Stevens (Katherine Heigl), about his relationship woes over alcohol, leading to a drunken sexual encounter between the two . Torres remains unaware of his sexual encounter, but becomes increasingly suspicious, and announces her desire to conceive a child . Shortly thereafter, however, she discovers that O'Malley has been unfaithful, ending their marriage . Though her personal life is troubled, Torres thrives professionally when she is appointed as the hospital's Chief Resident . However, she soon begins struggling to cope in the role, and is demoted soon thereafter . </P>

What season does callie get pregnant in grey's anatomy