who is the girl living with owen and amelia
Amelia Shepherd When Derek is offered a job by the President of the United States running a federal brain-mapping research project in Washington, D.C., Amelia, having begun assisting at Grey-Sloan Memorial Hospital with some of Derek's patients, takes over his practice, as the head of neurosurgery, at the hospital. She thus gained monikers, such as "Shepherdess" and "Lady Shepherd," so as to differentiate her from Derek. By season 11, she permanently moves in with her brother and her sister-in-law. Initially, she is known at Grey-Sloan largely as Derek's younger sister and once told her brother that she felt like she was constantly in his shadow. She soon begins a relationship with Owen Hunt (Kevin McKidd), her boss, and admits to Derek that she is falling in love with him. However, she later tells Owen that it was a mistake to mix their personal and professional lives. Following her brother's death and Meredith's "disappearance," she buries herself in work to distract herself. For some time she and Meredith were estranged over the circumstances of Derek's death but after listening to the very last phone message Derek had recorded for Meredith, she is finally able to let go of the animosity and reaches out to Meredith. Meredith's half sister Maggie moves in, with Amelia labeling the threesome "Lady Chief Trifecta." She gradually befriends Meredith's colleagues and is accepted into their circle. At the end of season 12, she marries Owen Hunt. However, the marriage is very turbulent at times. They struggle to adjust to married life, especially when Owen tells her that he wants kids as she does not want kids, nor does she want to go through the trauma of another pregnancy after the loss of her first child (who Owen doesn't know about). This strains the marriage to the point where she moves out and avoids him entirely. During the rest of the season, she grows closer to the two sisters and focuses more on her work, ignoring her stalling marriage. In season 14, when she went into an MRI as part of a study conducted by Carina DeLuca on female brain activity, she found out that she has a brain tumor. Her old mentor Thomas Koracick removes it without a problem, but Amelia is forced to step back and reconsider how the tumor had affected her life choices and personality. She and Owen end up having an understanding to break up their marriage but still remain close friends. She later assists Owen when he is chosen as a foster parent for a baby boy and bonds with the child's mother, Betty, who is a drug addict. Amelia feels the obligation to become her sponsor and the two of them move in with Owen so they can help Betty maintain her sobriety while allowing her to spend time with her son.
Caterina Scorsone In 2010, Scorsone joined the cast of Shonda Rhimes' drama series Private Practice in the recurring role of Amelia Shepherd, the sister of Derek Shepherd from Grey's Anatomy.[8] She was cast after Eric Stoltz, who was directing one of the show's episodes, heard about the role of Amelia and remembered Scorsone from working with her on My Horrible Year! He mentioned her to Shonda Rhimes and commented on the resemblance Scorsone had to Patrick Dempsey (the actor who plays Derek Shepherd).[6] As of July 2010, Scorsone had been promoted to series regular for Private Practice.[9] She appeared in the third episode of the seventh season of Grey's Anatomy where Amelia and Derek started to reconcile their differences.[10]