Hayley Smith is a fictional character from the animated television series American Dad!. She is the daughter of the main character, Stan Smith, and is known for her strong-willed personality and progressive views. Hayley often clashes with her conservative father, reflecting the show's themes of political and social commentary. In addition to her outspoken nature, Hayley is portrayed as an environmental activist and a college student. She frequently engages in various causes, showcasing her commitment to social justice and sustainability. Her character adds depth to the show's exploration of family dynamics and differing ideologies.