Answer
The answer is "Roswell," an American science fiction television series that premiered on The WB in 1999. The show revolves around the lives of three extraterrestrial beings who crash-land in the fictional town of Roswell, New Mexico, and the humans who discover them. Emilie de Ravin played Tess Harding, a teenage girl who befriends one of the aliens. The series ran for three seasons before being canceled in 2001.