Alex Karev is a fictional character from the television series Grey's Anatomy, portrayed by actor Justin Chambers. He is introduced as a surgical intern at Seattle Grace Hospital and is known for his initially abrasive personality, which softens over time. Alex specializes in pediatric surgery and demonstrates significant growth throughout the series, evolving from a self-centered intern to a compassionate and skilled doctor. Throughout the series, Alex develops complex relationships with other characters, including Meredith Grey and Izzie Stevens. His character is marked by personal struggles, including a challenging childhood and romantic entanglements. Ultimately, Alex becomes a beloved character, known for his loyalty and dedication to his patients.