Supergirl is the name of several fictional superheroines appearing in American comic books published by DC Comics.
The original, current, and most well known Supergirl is Kara Zor-El, the cousin of superhero Superman. The character made her first appearance in Action Comics #252 (May 1959).
The first live-action depiction of Supergirl was in the 1984 film, starring Helen Slater as Kara Zor-El/Linda Lee/Supergirl. The film is a spinoff from the Salkind Superman film series.
A television series centered around the Kara Zor-El version of Supergirl, set in the shared universe Arrowverse, titled Supergirl starring Melissa Benoist as Kara, premiered on CBS on October 26, 2015, before later moving onto The CW on May 12, 2016.