Ugly Betty is an American comedy-drama television series. It premiered on September 28, 2006, and ended on April 14, 2010. The series is based on Fernando Gaitán's Colombian telenovela Yo soy Betty, la fea. During its first three seasons, it aired on Thursday nights, where it was mostly successful. However, viewership dropped significantly in the show's third season, particularly in the 18–49 age group. In the years since, it has gained a cult following.