Working Girl

Working Girl is a movie starring Melanie Griffith, Harrison Ford, and Sigourney Weaver. When a secretary's idea is stolen by her boss, she seizes an opportunity to steal it back by pretending she has her boss' job.
Tess McGill is an ambitious secretary with a unique approach for climbing the ladder to success. When her classy, but villainous boss breaks a leg skiing, Tess takes over her office, her apartment and even her wardrobe. She creates a deal with a handsome investment banker that will either take her to the top, or finish her off for good.