Working Girl (1988)
Working Girl is a 1988 romantic comedy film written by Kevin Wade and directed by Mike Nichols. It tells the inspiring story of a Staten Island-raised secretary, Tess McGill (Melanie Griffith), working in the mergers and acquisitions department of a Wall Street investment bank. When her boss, Katharine Parker (Sigourney Weaver), breaks her leg skiing, Tess uses Parker's absence and connections, including her errant beau Jack Trainer (Harrison Ford), to put forward her own idea for a merger deal.
More at Wikipedia.