Amelia Shepherd is a fictional character from the television series Grey's Anatomy and its spin-off, Private Practice. She is portrayed by actress Caterina Scorsone. Amelia is a skilled neurosurgeon known for her expertise and strong personality. She is the younger sister of Derek Shepherd, a prominent character in the series. Amelia's character has faced numerous personal challenges, including struggles with addiction and the loss of loved ones. Throughout the series, she evolves, forming significant relationships with other characters, including Owen Hunt and Link. Her journey highlights themes of resilience and personal growth in the medical field.