How do you find out movie stars' real names?

IMDb.com, EmpireOnline.com and FoxNews.com provide lists of actors and actresses who have changed their names. These lists include their working names and their birth names. The lists at IMDb.com and EmpireOnline.com focus on actors and actresses, while the list at FoxNews.com features names of all types of celebrities.

Examples include actor Martin Sheen, who was born as Ramon Antonio Gerard Estevez, and his famous son, Charlie Sheen, who was born as Carlos Esteves. Another famous son, Emilio Estevez, does not use a stage name. Nicolas Cage was born as Nicolas Coppola. Cage created a stage name so he would not be accused of nepotism, since his uncle was famous director Francis Ford Coppola.