Hayley Smith (American Dad!)

Hayley Dreamsmasher Smith-Fischer is a fictional character from the animated television series ''American Dad!'' She is voiced by Rachael MacFarlane, the younger sister of one of the series' co-creators, Seth MacFarlane. She is Stan and Francine Smith's 19-year-old daughter (18 when the series started) and Steve's older sister.

Hayley, along with her father Stan, was one of the first two characters who were conceived and created for the series. Across the series, Hayley's storylines typically involve her liberal opinions clashing with her father's staunch conservative beliefs, and her on-again-off-again relationship with boyfriend Jeff Fischer, whom she marries in the show's sixth season. Provided by Wikipedia