Michael Christopher Kelso, usually referred to simply as Kelso by his friends, is one of the five male leads on Fox Network's That '70s Show, portrayed by Ashton Kutcher. Tall, lanky and long-haired, Kelso had been accepted as the local idiot until he moved to Chicago for the eighth season. His behavior is very much in line with a stereotypical oversexed lunkhead or a male-bimbo who gets through life on his good looks. He spends most of the series in a mutually parasitic relationship with the equally vapid Jackie Burkhart, whom he continues to obsess over following their numerous breakups. In spite of his stupidity, Kelso was shown on several occasions not to be immature, simply unmotivated; when he was either forced to or chose to, Kelso displayed startling intelligence unbecoming of his usual personality or hijinks. Near the end of the series, Kelso became one of the first characters to completely break away from adolescence and into adulthood when he impregnated a girl with whom he had a one-night stand; to his friends' surprise, Kelso took responsibility for the child, moving to Chicago to take a job to support and be near his newborn daughter.